Chronic heart failure: Difference between revisions
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− | == |
+ | ==Background== |
+ | ===Definition=== |
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− | * A syndrome of volume overload and poor tissue perfusion that is caused by cardiac dysfunction and is characterized by dyspnea, fatigue, and edema |
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− | * Two broad types: |
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− | ** Heart failure with reduced ejection fraction <40% (HFrEF or systolic dysfunction) |
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− | ** Heart failure with preserved ejection fraction (HFpEF or diastolic dysfunction) |
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+ | *A syndrome of volume overload and poor tissue perfusion that is caused by cardiac dysfunction and is characterized by dyspnea, fatigue, and edema |
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− | == Stages == |
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+ | *Two broad types: |
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+ | **Heart failure with reduced ejection fraction <40% (HFrEF or systolic dysfunction) |
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+ | **Heart failure with preserved ejection fraction (HFpEF or diastolic dysfunction) |
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+ | ===Stages=== |
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− | * '''Stage A:''' no structural heart disease or symptoms but high risk for developing HF (e.g., patients with diabetes mellitus or hypertension) |
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− | * '''Stage B:''' structural heart disease without symptoms of HF (e.g., patients with a previous MI and asymptomatic LV dysfunction) |
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− | * '''Stage C:''' structural heart disease with symptoms of HF (e.g., patients with a previous MI with dyspnea and fatigue) |
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− | * '''Stage D:''' refractory HF requiring special interventions (e.g., patients with refractory HF who are awaiting cardiac transplantation). |
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+ | *'''Stage A:''' no structural heart disease or symptoms but high risk for developing HF (e.g., patients with diabetes mellitus or hypertension) |
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− | == Etiology == |
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+ | *'''Stage B:''' structural heart disease without symptoms of HF (e.g., patients with a previous MI and asymptomatic LV dysfunction) |
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+ | *'''Stage C:''' structural heart disease with symptoms of HF (e.g., patients with a previous MI with dyspnea and fatigue) |
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+ | *'''Stage D:''' refractory HF requiring special interventions (e.g., patients with refractory HF who are awaiting cardiac transplantation). |
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+ | ===Etiologies=== |
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− | * HFrEF |
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− | ** Coronary artery disease |
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− | ** Myocardial infarction |
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− | ** Hypertension |
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− | * HFpEF |
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− | ** Myocardial infarction |
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− | ** Hypertension |
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+ | ====By Subtype==== |
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− | == Differential Diagnosis == |
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+ | *Reduced ejection fraction (LVEF ≤40%) |
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− | * Common |
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+ | **[[Coronary artery disease]] (most common) |
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− | ** Tachyarrhythmia |
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+ | **[[Hypertension]] (most common) |
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− | ** Valvular disease |
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+ | **[[Myocarditis]], including viral infection |
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− | ** If CAD risk factors: |
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+ | **Chronic alcohol use |
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− | *** Coronary artery disease |
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+ | **[[Valvular heart disease]] |
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− | *** Hypertensive cardiomyopathy |
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+ | **[[Chemotherapy]], such as [[doxorubicin]] or [[trastuzumab]] |
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− | * Other risks |
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+ | **[[Peripartum cardiomyopathy]] |
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− | ** Toxic agents: alcohol, amphetamines, cocaine, steroids, chemotherapy, heavy metals, radiation |
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+ | **[[Idiopathic dilated cardiomyopathy]] |
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− | ** Pregnancy: PPCM, pre-eclampsia, gestational diabetes |
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+ | **Genetic causes of [[cardiomyopathy]] |
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− | ** Inflammatory or infectious: myocarditis, sarcoidosis, infectious hypereosinophilia, giant celll lymphocytic, auto-immune diseases |
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+ | *Preserved ejection fraction (LVEF ≥50%) |
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− | ** Metabolic: diabetes, thyroid disease, adrenal insufficiency, pheochromocytoma, Cushing disease |
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+ | **[[Hypertension]] (most common) |
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− | ** Nutritional: thiamine deficiency, selenium deficiency, malnutrition, obesity |
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+ | **[[Myocardial infarction]] |
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− | ** Infiltrative: amyloidosis, glycogen storage disease, Fabry disease |
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+ | *Mildly reduced ejection fraction (LVEF 41-49%) |
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− | ** Hereditary: hypertrophic cardiomyopathy, ARVC, LV noncompaction, hemochromatosis |
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− | ** Acute respiratory distress syndrome (ARDS) |
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+ | ====By Cardiomyopathy==== |
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− | == Epidemiology == |
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+ | *Dilated cardiomyopathy: toxins (alcohol, cocaine, chemotherapy), myocarditis, Chagas disease, peripartum cardiopmyopathy, familial cardiomyopathies |
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− | * 6-10% of people over age 65 |
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+ | *Hypertrophic cardiomyopathy: hypertension |
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+ | *Restrictive cardiomyopathy |
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+ | *Arrhythmogenic right ventricular cardiomyopathy |
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+ | *Unclassified cardiomyopathy: [[Takotsubo cardiomyopathy]], [[non-compaction cardiomyopathy]] |
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− | == Risk |
+ | ====By Risk Factor==== |
+ | *Common |
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− | * Previous episode of acute heart failure |
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+ | **Tachyarrhythmia |
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− | * Prior atrial fibrillation or coronary bypass surgery |
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+ | **Valvular heart disease |
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− | * Myocardial infarction |
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+ | **If CAD risk factors: |
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− | * Coronary artery disease |
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+ | ***Coronary artery disease |
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− | * Diabetes |
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+ | ***Hypertensive cardiomyopathy |
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− | * Hypertension |
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+ | *Other risks |
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+ | **Toxic agents: alcohol, amphetamines, cocaine, steroids, chemotherapy, heavy metals, radiation |
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+ | **Pregnancy: PPCM, pre-eclampsia, gestational diabetes |
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+ | **Inflammatory or infectious: myocarditis, sarcoidosis, infectious hypereosinophilia, giant celll lymphocytic, auto-immune diseases |
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+ | **Metabolic: diabetes, thyroid disease, adrenal insufficiency, pheochromocytoma, Cushing disease |
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+ | **Nutritional: thiamine deficiency, selenium deficiency, malnutrition, obesity |
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+ | **Infiltrative: amyloidosis, glycogen storage disease, Fabry disease |
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+ | **Hereditary: hypertrophic cardiomyopathy, ARVC, LV noncompaction, hemochromatosis |
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+ | **Acute respiratory distress syndrome (ARDS) |
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+ | ===Epidemiology=== |
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− | == Clinical Manifestations == |
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+ | *6-10% of people over age 65 |
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− | === History === |
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+ | ===Risk Factors=== |
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− | * Hx of heart failure, MI, or CAD |
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− | * Dyspnea on exertion |
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− | * Paroxysmal nocturnal dyspnea |
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− | * Orthopnea |
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− | * Fatigue |
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− | * Determine [[NYHA classification of functional status]] |
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+ | *Previous episode of [[acute heart failure]] |
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− | === Signs & Symptoms === |
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+ | *Prior [[atrial fibrillation]] or [[coronary artery bypass surgery]] |
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+ | *[[Myocardial infarction]] |
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+ | *[[Coronary artery disease]] |
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+ | *[[Diabetes mellitus]] |
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+ | *[[Hypertension]] |
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+ | ==Clinical Manifestations== |
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− | * Cardiac exam: S3 present, abdominojugular reflux, elevated JVP |
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− | * Respiratory exam: crackles/rales |
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− | * Lower extremity edema |
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+ | ===History=== |
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− | {| |
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+ | |||
+ | *Hx of heart failure, MI, or CAD |
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+ | *Dyspnea on exertion |
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+ | *Paroxysmal nocturnal dyspnea |
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+ | *Orthopnea |
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+ | *Fatigue |
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+ | *Determine [[NYHA classification of functional status]] |
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+ | |||
+ | ===Signs & Symptoms=== |
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+ | |||
+ | *Cardiac exam: S3 present, abdominojugular reflux, elevated JVP |
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+ | *Respiratory exam: crackles/rales |
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+ | *Lower extremity edema |
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+ | |||
+ | {| class="wikitable" |
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! |
! |
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− | ! |
+ | !Dry |
− | ! |
+ | !Wet |
|- |
|- |
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− | | |
+ | |Warm |
− | | |
+ | |Less congested<br />Better-perfused |
− | | |
+ | |More congested<br />Better-perfused |
|- |
|- |
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− | | |
+ | |Cold |
− | | |
+ | |Less congested<br />Poorly perfused |
− | | |
+ | |Less congested<br />Poorly perfused |
|} |
|} |
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+ | ===Prognosis=== |
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− | == Investigations == |
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+ | *Following an admission, 25% risk of 30-day readmission and 37% 1-year mortality |
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− | * Lab |
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+ | *3-year all-cause mortality is 24% in HFpEF and 32% in HFrEF |
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− | ** Troponins |
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+ | *Sudden cardiac death is the cause of 50% of deaths |
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− | ** Natriuretic peptide (if diagnosis uncertain) |
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+ | *Many risk calculators exist, including the [http://www.heartfailurerisk.org/ MAGICC risk score] |
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− | *** NT-proBNP > 450 pg/mL if age < 50 years and > 900 pg/mL if age > 50 years; <100 pg/mL helps rule it out |
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− | * Imaging |
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− | ** Chest X-ray showing pulmonary venous or interstitial edema, cardiomegaly, or pleural effusions |
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− | * Other |
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− | ** EKG showing new atrial fibrillation, ischemic changes, or any other abnormality |
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− | ** Echocardiography |
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− | *** Systolic heart failure |
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− | **** Reduced LV ejection fraction (LVEF) |
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− | *** Diastolic heart failure |
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− | **** E/A ratio less than 1 |
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− | **** MV deceleration time > 220ms |
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− | == |
+ | ==Investigations== |
+ | *Lab |
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− | === Acute heart failure === |
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+ | **Troponins |
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+ | **Natriuretic peptide (if diagnosis uncertain) |
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+ | ***NT-proBNP > 450 pg/mL if age < 50 years and > 900 pg/mL if age > 50 years; <100 pg/mL helps rule it out |
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+ | *Imaging |
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+ | **Chest X-ray showing pulmonary venous or interstitial edema, cardiomegaly, or pleural effusions |
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+ | *Other |
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+ | **EKG showing new atrial fibrillation, ischemic changes, or any other abnormality |
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+ | **Echocardiography |
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+ | ***Systolic heart failure |
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+ | ****Reduced LV ejection fraction (LVEF) |
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+ | ***Diastolic heart failure |
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+ | ****E/A ratio less than 1 |
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+ | ****MV deceleration time > 220ms |
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+ | ==Management== |
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− | See also [[Acute heart failure management]] |
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+ | *See also [[Acute heart failure#Management|Acute heart failure management]] |
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− | * Position the patient upright, ideally with legs over bed to aid venous pooling and decrease preload |
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− | * Supplemental oxygen, stepping up from nasal prongs to face mask to BiPAP to intubation and ventilation, as necessary |
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− | * Furosemide IV 40-80mg depending on severity, for volume reduction; or infusion 5-20mg/h |
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− | * Fluid and salt restrict |
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− | * Monitor urine output |
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− | * Monitor daily weights |
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− | ** Target 1kg (0.5-1.5) weight loss with 3L urine output daily |
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− | * Can escalate up to 20mg/h furosemide with 5mg BID metolazone |
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− | * SBP < 90 / MAP < 60 |
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− | ** Consider dopamine or other vasopressor |
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− | ** Consider dobutamine |
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− | * SBP 90-100 / MAP 60-65: |
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− | ** Consider PA catheter |
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− | ** Consider dobutamine or milrinone |
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− | * SBP >100 or MAP>65 |
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− | ** Nitroglycerin transdermal patch 0.4-0.8mg/h, for afterload reduction |
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− | ** Alternate: nitroglycerin infusion titrated to maintain BP |
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− | * Supportive care with morphine or hydromorphone, for pain and dyspnea |
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− | * At discharge: |
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− | ** Document weight (should be lower than admission) |
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− | ** Document BNP (should be lower than admission) |
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− | * HFpEF |
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− | ** Control blood pressure (most common cause is hypertension) |
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− | ** ACEi/ARB, especially candesartan, is probably best for ACEi |
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− | ** Consider aldosterone antagonist |
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− | ** Monitor and maintain volume status |
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− | * Advanced HF therapies (mechanical support, transplant) |
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− | ** LVEF <25% |
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− | ** End-organ dysfunction |
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− | ** Recurrent hospitalizations 2x/12months unexplained |
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− | ** Unable to tolerate medical therapies, including hypotension |
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− | ** Diuretic refractory |
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− | ** Inotropic support |
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− | ** Pulmonary hypertension and right heart failure |
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− | ** Six-minute walk test <300m |
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− | ** Increased 1yr mortality >20% |
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− | ** Renal or hepatic dysfunction |
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− | ** Chronic hyponatremia <134 chronically |
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− | ** Cardiac cachexia |
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− | ** Unable to tolerate ADLs |
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+ | ===Non-Pharmacologic Management=== |
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− | === Chronic heart failure === |
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+ | *Consider referral to multidisciplinary outpatient clinic |
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− | ==== Non-pharmacologic management ==== |
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+ | *Diet |
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+ | **No-added-salt diet (2-3 g/day); 1-2g/day if severe fluid retention |
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+ | **Fluid limited to 1.5 L/day to 2 L/day from all sources, if diuretics fail |
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+ | *Exercise: regular exercise 3-5 times a week for 30-45 min per session (after stress test) |
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+ | *Lifestyle |
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+ | **Smoking cessation |
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+ | **Decrease or eliminate alcohol intake |
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+ | *Monitor body weight regularly for sudden increases (e.g. 2 kg increase in 3 days) |
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+ | *Pneumococcal and annual influenza vaccines |
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+ | *Avoid, when possible: NSAIDs (including COX-2 inhibitors), glucocorticoids, class I antiarrhythmics, sotalol and ibutilide,TCAs, dronedarone, verapamil and diltiazem (except in HFpEF), α-blockers, moxonidine, metformin, thiazolidinediones, anthracyclines |
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+ | ===Manage Comorbidities=== |
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− | * Regular exercise 3-5 times a week for 30-45 min per session (after stress test) |
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− | * No-added-salt diet (2-3 g/day); 1-2g/day if severe fluid retention |
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− | * Fluid limited to 1.5 L/day to 2 L/day from all sources, if diuretics fail |
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− | * Consider referral to multidisciplinary outpatient clinic |
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+ | *Replace iron-deficiency with IV iron (improves quality of life) |
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− | ==== Comorbidities ==== |
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+ | *Avoid treating diabetes with glitazones, prefer SGLT-2 inhibitors |
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+ | *Treat hypertension, especially in HFpEF |
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+ | ===Pharmacologic Treatments=== |
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− | * Replace iron-deficiency with IV iron (improves quality of life) |
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+ | |||
− | * Avoid treating diabetes with glitazones, prefer SGLT-2 inhibitors |
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− | * |
+ | *Treat cardiovascular risk factors (hypertension, dyslipidemia, atherosclerotic disease) |
+ | **Previous MI: [[ASA]] 81 mg PO daily if indicated for secondary prevention |
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+ | **[[Atrial fibrillation]]: [[warfarin]] or other anticoagulation |
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+ | |||
+ | ==== HFrEF ==== |
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+ | *For symptomatic HFrEF ≤40%, the overall approach is quadruple therapy: ARNI or ACEi/ARB, β-blockers, aldosterone agonists, and SGLT2 inhibitors |
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+ | **Start with β-blocker plus SGLT2i, then ARNI, then MRA, so that they are on all four after a few weeks |
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+ | ***SGLT2i has very quick benefit, regardless of diabetes, and should be started early |
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+ | ***ARNIs have diuretic effect, so may need to decrease [[furosemide]] |
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+ | **Titrate up every 4 to 8 weeks |
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+ | **Monitor renal function and electrolytes 1 and 4 weeks after any increase, then monthly for 2 months, every 3 months for 9 months, and every 4 months indefinitely |
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+ | *Reassess NYHA class after maximizing treatment |
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+ | **NYHA I: continue |
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+ | **NYHA II-IV and sinus rhythm with resting HR ≥70: consider adding [[ivabradine]] |
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+ | **NYHA III/IV: consider referral for advanced HF therapies including mechanical supprot |
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+ | *Reassess LVEF after maximizing treatment |
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+ | **If NYHA I-III and LVEF ≤35%: consider ICD/CRT |
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+ | **NYHA IV: consider [[hydralazine]]/[[nitrates]], referral for mechanical support or transplant, refer to palliative care |
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+ | *If congestive symptoms: |
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+ | **First-line: loop diuretic at lowest minimal dose required to control symptoms |
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+ | **Second-line: consider adding [[Thiazides|thiazide]] or low-dose [[metolazone]] |
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+ | **Last-line: consider adding [[digoxin]] if severe symptoms or poorly-controlled [[atrial fibrillation]] |
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+ | |||
+ | ===== SGLT2 Inhibitors ===== |
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+ | |||
+ | *Contraindicated in GFR <25ish (depending on agent) |
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+ | *Increased risk of genital mycotic infections |
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+ | |||
+ | ====Doses==== |
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+ | {| class="wikitable" |
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+ | !Medication |
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+ | !Starting Dose |
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+ | !Titration |
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+ | !Usual Dose |
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+ | !Notes |
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+ | |- |
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+ | ! colspan="5" |Diuretics: Loop |
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+ | |- |
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+ | |[[furosemide]] |
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+ | |20-40 mg/d |
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+ | | |
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+ | |40-240 mg/d |
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+ | | |
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+ | |- |
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+ | |[[torasemide]] |
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+ | |5-10 mg/d |
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+ | | |
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+ | |10-20 mg/d |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |Diuretics: Thiazide-Like |
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+ | |- |
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+ | |[[chlorthalidone]] |
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+ | |12.5-25 mg/d |
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+ | | |
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+ | |25-100 mg/d |
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+ | | |
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+ | |- |
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+ | |[[hydrochlorothiazide]] |
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+ | |25 mg/d |
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+ | | |
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+ | |12.5-100 mg/d |
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+ | | |
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+ | |- |
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+ | |[[indapamide]] |
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+ | |2.5 mg/d |
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+ | | |
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+ | |2.5-5 mg/d |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |Diuretics: Potassium-Sparing |
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+ | |- |
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+ | |[[amiloride]] |
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+ | |2.5 mg/d |
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+ | | |
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+ | |5-10 mg/d |
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+ | | |
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+ | |- |
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+ | |[[eplerenone]] |
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+ | |25 mg/d |
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+ | | |
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+ | |50 mg/d |
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+ | | |
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+ | |- |
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+ | |[[spirolonactone]] |
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+ | |12.5-25 mg/d |
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+ | | |
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+ | |50 mg/d |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |β-Blockers |
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+ | |- |
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+ | |[[bisoprolol]] |
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+ | |1.25 mg daily |
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+ | |2.5, 3.75, 5, 7, 10 |
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+ | | |
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+ | | |
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+ | |- |
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+ | |[[carvedilol]] |
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+ | |3.125 mg bid |
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+ | |6.25, 12.5, 25, 50 |
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+ | | |
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+ | | |
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+ | |- |
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+ | |[[metoprolol succinate]] CR |
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+ | |12.5-25 mg daily |
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+ | |25, 50, 100, 200 |
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+ | | |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |Angiotensin Antagonists: ACE Inhibitors |
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+ | |- |
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+ | |[[enalapril]] |
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+ | |2.5 mg bid |
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+ | | |
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+ | |10-20 mg bid |
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+ | | |
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+ | |- |
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+ | |[[captopril]] |
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+ | |6.25 mg tid |
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+ | | |
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+ | |50 mg tid |
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+ | | |
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+ | |- |
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+ | |[[lisinopril]] |
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+ | |2.5-5 mg daily |
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+ | | |
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+ | |20-35 mg daily |
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+ | | |
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+ | |- |
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+ | |[[ramipril]] |
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+ | |2.5 mg daily |
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+ | | |
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+ | |5 mg daily |
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+ | | |
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+ | |- |
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+ | |[[trandolapril]] |
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+ | |0.5 mg daily |
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+ | | |
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+ | |4 mg daily |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |Angiotensin Antagonists: ARBs |
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+ | |- |
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+ | |[[candesartan]] |
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+ | |4-8 mg daily |
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+ | | |
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+ | |32 mg daily |
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+ | | |
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+ | |- |
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+ | |[[valsartan]] |
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+ | |40 mg bid |
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+ | | |
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+ | |160 mg bid |
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+ | | |
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+ | |- |
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+ | |[[losartan]] |
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+ | |50 mg daily |
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+ | | |
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+ | |150 mg daily |
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+ | | |
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+ | |- |
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+ | ! colspan="5" |Angiotensin Antagonists: ARB/ARNI |
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+ | |- |
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+ | |[[valsartan/sacubitril]] |
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+ | |24/26 mg bid |
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+ | | |
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+ | |97/103 mg bid |
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+ | |If on ACEi, need 36 hour washout period before starting |
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+ | |- |
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+ | ! colspan="5" |SGLT2 Inhibitors |
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+ | |- |
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+ | | |
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+ | | |
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+ | | |
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+ | | |
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+ | | |
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+ | |} |
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+ | ===Procedures=== |
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− | ==== Pharmacologic treatments ==== |
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+ | *Cardiac resynchronization therapy is indicated when LVEF<30%, LBBB, and QRS > 150ms |
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− | * Treat cardiovascular risk factors (hypertension, dyslipidemia, atherosclerotic disease) |
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+ | *Devices |
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− | ** Previous MI: ASA 81mg po daily if indicated for secondary prevention |
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+ | **ICD if EF <35% |
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− | ** Atrial fibrillation: warfarin or other anticoagulation |
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+ | **CRT +/- ICD if reduced EF and LBBB |
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− | * Overall approach is triple therapy: ACEi, beta-blockers, aldosterone agonists |
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+ | *Implantable hemodynamic monitor (CardioMEMS) |
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− | * Reassess NYHA class after maximizing treatment |
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+ | **Pulmonary artery pressure sensor |
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− | ** NYHA I: continue |
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+ | **Better than daily weights for predicting heart failure exacerbations |
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− | ** NYHA II-IV and sinus rhythm with HR ≥70: add ivabradine and switch ACEi to ARNI (Entresto) |
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+ | **Reduces hospitalizations by 30% |
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− | ** NYHA II-IV and sinus rhythm with HR < 70bpm or AF or pacemaker: switch ACEi to ARNI (Entresto) |
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+ | **Studied in HFpEF and HFrEF |
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− | * Reassess LVEF |
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+ | **Expensive! $20k |
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− | ** If NYHA I-III and LVEF ≤35%: consider ICD/CRT |
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+ | *Surgery: see advanced therapies, below |
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− | ** NYHA IV: consider hydralazine/nitrates, referral for mechanical support or transplant, refer to palliative care |
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− | * HFrEF: |
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− | ** First-line: ACE inhibitor (second-line: ARB) |
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− | ** First-line: beta-blocker (second-line: CCB) |
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− | *** Titrate slowly, doubling dose q2-4 weeks |
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− | *** Objective improvement may take 6-12 months |
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− | ** If severe symptoms and LVEF<30%: aldosterone antagonist |
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− | ** If African-American: consider adding ISDN |
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− | ** If congestive symptoms: |
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− | *** First-line: loop diuretic at lowest minimal dose required to control symptoms |
||
− | *** Second-line: consider adding thiazide or low-dose metolazone |
||
− | *** Last-line: consider adding digoxin if severe symptoms or poorly-controlled atrial fibrillation |
||
− | * Monitor blood pressure while titrating up medication |
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− | === |
+ | ===Advanced Therapies=== |
+ | *Consider advanced therapies such as [[left ventricular assist device]] or [[cardiac transplantation]] when heart failure is severe and refractory |
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− | * Cardiac resynchronization therapy is indicated when LVEF<30%, LBBB, and QRS > 150ms |
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+ | *Possible indications include: |
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− | * Devices |
||
− | ** |
+ | **LVEF <25% |
+ | **End-organ dysfunction |
||
− | ** CRT +/- ICD if reduced EF and LBBB |
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+ | **Recurrent hospitalizations 2x/12months unexplained |
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− | * Implantable hemodynamic monitor (CardioMEMS) |
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+ | **Unable to tolerate medical therapies, including hypotension |
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− | ** Pulmonary artery pressure sensor |
||
+ | **Diuretic refractory |
||
− | ** Better than daily weights for predicting heart failure exacerbations |
||
+ | **Inotropic support |
||
− | ** Reduces hospitalizations by 30% |
||
+ | **Pulmonary hypertension and right heart failure |
||
− | ** Studied in HFpEF and HFrEF |
||
+ | **Six-minute walk test <300m |
||
− | ** Expensive! $20k |
||
+ | **Increased 1yr mortality >20% |
||
− | * Surgery |
||
+ | **Renal or hepatic dysfunction |
||
− | ** Ventricular assist devices |
||
+ | **Chronic hyponatremia <134 chronically |
||
− | ** CABG |
||
+ | **Cardiac cachexia |
||
− | ** Transplant |
||
+ | **Unable to tolerate ADLs |
||
− | == |
+ | ==Prognosis== |
− | * |
+ | *30-40% of patients die within 1 year of diagnosis and 60-70% die within 5 years |
− | * |
+ | *NYHA II have a 5-10% annual mortality rate |
− | * |
+ | *NYHA IV have a 30--70% annual mortality rate |
− | * |
+ | *[https://www.mdcalc.com/maggic-risk-calculator-heart-failure MAGGIC risk score] |
− | ** |
+ | **Estimates 1 and 3 year survival |
− | == |
+ | ==Palliative Care== |
− | == |
+ | ==Further Reading== |
− | * |
+ | *[http://accessmedicine.mhmedical.com.myaccess.library.utoronto.ca/content.aspx?bookid=331§ionid=40727009 Harrison's 19e (Ch 234)] |
− | * |
+ | *[http://www.ccs.ca/images/Guidelines/Guidelines_POS_Library/HF_CC_2006.pdf CCS Heart Failure Guidelines Update 2006] |
− | * |
+ | *[https://doi.org/10.1001/jama.294.15.1944 Does this dyspneic patient in the emergency department have congestive heart failure? JAMA RCE 2005] |
[[Category:Cardiology]] |
[[Category:Cardiology]] |
Latest revision as of 11:26, 20 October 2021
Background
Definition
- A syndrome of volume overload and poor tissue perfusion that is caused by cardiac dysfunction and is characterized by dyspnea, fatigue, and edema
- Two broad types:
- Heart failure with reduced ejection fraction <40% (HFrEF or systolic dysfunction)
- Heart failure with preserved ejection fraction (HFpEF or diastolic dysfunction)
Stages
- Stage A: no structural heart disease or symptoms but high risk for developing HF (e.g., patients with diabetes mellitus or hypertension)
- Stage B: structural heart disease without symptoms of HF (e.g., patients with a previous MI and asymptomatic LV dysfunction)
- Stage C: structural heart disease with symptoms of HF (e.g., patients with a previous MI with dyspnea and fatigue)
- Stage D: refractory HF requiring special interventions (e.g., patients with refractory HF who are awaiting cardiac transplantation).
Etiologies
By Subtype
- Reduced ejection fraction (LVEF ≤40%)
- Coronary artery disease (most common)
- Hypertension (most common)
- Myocarditis, including viral infection
- Chronic alcohol use
- Valvular heart disease
- Chemotherapy, such as doxorubicin or trastuzumab
- Peripartum cardiomyopathy
- Idiopathic dilated cardiomyopathy
- Genetic causes of cardiomyopathy
- Preserved ejection fraction (LVEF ≥50%)
- Hypertension (most common)
- Myocardial infarction
- Mildly reduced ejection fraction (LVEF 41-49%)
By Cardiomyopathy
- Dilated cardiomyopathy: toxins (alcohol, cocaine, chemotherapy), myocarditis, Chagas disease, peripartum cardiopmyopathy, familial cardiomyopathies
- Hypertrophic cardiomyopathy: hypertension
- Restrictive cardiomyopathy
- Arrhythmogenic right ventricular cardiomyopathy
- Unclassified cardiomyopathy: Takotsubo cardiomyopathy, non-compaction cardiomyopathy
By Risk Factor
- Common
- Tachyarrhythmia
- Valvular heart disease
- If CAD risk factors:
- Coronary artery disease
- Hypertensive cardiomyopathy
- Other risks
- Toxic agents: alcohol, amphetamines, cocaine, steroids, chemotherapy, heavy metals, radiation
- Pregnancy: PPCM, pre-eclampsia, gestational diabetes
- Inflammatory or infectious: myocarditis, sarcoidosis, infectious hypereosinophilia, giant celll lymphocytic, auto-immune diseases
- Metabolic: diabetes, thyroid disease, adrenal insufficiency, pheochromocytoma, Cushing disease
- Nutritional: thiamine deficiency, selenium deficiency, malnutrition, obesity
- Infiltrative: amyloidosis, glycogen storage disease, Fabry disease
- Hereditary: hypertrophic cardiomyopathy, ARVC, LV noncompaction, hemochromatosis
- Acute respiratory distress syndrome (ARDS)
Epidemiology
- 6-10% of people over age 65
Risk Factors
- Previous episode of acute heart failure
- Prior atrial fibrillation or coronary artery bypass surgery
- Myocardial infarction
- Coronary artery disease
- Diabetes mellitus
- Hypertension
Clinical Manifestations
History
- Hx of heart failure, MI, or CAD
- Dyspnea on exertion
- Paroxysmal nocturnal dyspnea
- Orthopnea
- Fatigue
- Determine NYHA classification of functional status
Signs & Symptoms
- Cardiac exam: S3 present, abdominojugular reflux, elevated JVP
- Respiratory exam: crackles/rales
- Lower extremity edema
Dry | Wet | |
---|---|---|
Warm | Less congested Better-perfused |
More congested Better-perfused |
Cold | Less congested Poorly perfused |
Less congested Poorly perfused |
Prognosis
- Following an admission, 25% risk of 30-day readmission and 37% 1-year mortality
- 3-year all-cause mortality is 24% in HFpEF and 32% in HFrEF
- Sudden cardiac death is the cause of 50% of deaths
- Many risk calculators exist, including the MAGICC risk score
Investigations
- Lab
- Troponins
- Natriuretic peptide (if diagnosis uncertain)
- NT-proBNP > 450 pg/mL if age < 50 years and > 900 pg/mL if age > 50 years; <100 pg/mL helps rule it out
- Imaging
- Chest X-ray showing pulmonary venous or interstitial edema, cardiomegaly, or pleural effusions
- Other
- EKG showing new atrial fibrillation, ischemic changes, or any other abnormality
- Echocardiography
- Systolic heart failure
- Reduced LV ejection fraction (LVEF)
- Diastolic heart failure
- E/A ratio less than 1
- MV deceleration time > 220ms
- Systolic heart failure
Management
- See also Acute heart failure management
Non-Pharmacologic Management
- Consider referral to multidisciplinary outpatient clinic
- Diet
- No-added-salt diet (2-3 g/day); 1-2g/day if severe fluid retention
- Fluid limited to 1.5 L/day to 2 L/day from all sources, if diuretics fail
- Exercise: regular exercise 3-5 times a week for 30-45 min per session (after stress test)
- Lifestyle
- Smoking cessation
- Decrease or eliminate alcohol intake
- Monitor body weight regularly for sudden increases (e.g. 2 kg increase in 3 days)
- Pneumococcal and annual influenza vaccines
- Avoid, when possible: NSAIDs (including COX-2 inhibitors), glucocorticoids, class I antiarrhythmics, sotalol and ibutilide,TCAs, dronedarone, verapamil and diltiazem (except in HFpEF), α-blockers, moxonidine, metformin, thiazolidinediones, anthracyclines
Manage Comorbidities
- Replace iron-deficiency with IV iron (improves quality of life)
- Avoid treating diabetes with glitazones, prefer SGLT-2 inhibitors
- Treat hypertension, especially in HFpEF
Pharmacologic Treatments
- Treat cardiovascular risk factors (hypertension, dyslipidemia, atherosclerotic disease)
- Previous MI: ASA 81 mg PO daily if indicated for secondary prevention
- Atrial fibrillation: warfarin or other anticoagulation
HFrEF
- For symptomatic HFrEF ≤40%, the overall approach is quadruple therapy: ARNI or ACEi/ARB, β-blockers, aldosterone agonists, and SGLT2 inhibitors
- Start with β-blocker plus SGLT2i, then ARNI, then MRA, so that they are on all four after a few weeks
- SGLT2i has very quick benefit, regardless of diabetes, and should be started early
- ARNIs have diuretic effect, so may need to decrease furosemide
- Titrate up every 4 to 8 weeks
- Monitor renal function and electrolytes 1 and 4 weeks after any increase, then monthly for 2 months, every 3 months for 9 months, and every 4 months indefinitely
- Start with β-blocker plus SGLT2i, then ARNI, then MRA, so that they are on all four after a few weeks
- Reassess NYHA class after maximizing treatment
- NYHA I: continue
- NYHA II-IV and sinus rhythm with resting HR ≥70: consider adding ivabradine
- NYHA III/IV: consider referral for advanced HF therapies including mechanical supprot
- Reassess LVEF after maximizing treatment
- If NYHA I-III and LVEF ≤35%: consider ICD/CRT
- NYHA IV: consider hydralazine/nitrates, referral for mechanical support or transplant, refer to palliative care
- If congestive symptoms:
- First-line: loop diuretic at lowest minimal dose required to control symptoms
- Second-line: consider adding thiazide or low-dose metolazone
- Last-line: consider adding digoxin if severe symptoms or poorly-controlled atrial fibrillation
SGLT2 Inhibitors
- Contraindicated in GFR <25ish (depending on agent)
- Increased risk of genital mycotic infections
Doses
Medication | Starting Dose | Titration | Usual Dose | Notes |
---|---|---|---|---|
Diuretics: Loop | ||||
furosemide | 20-40 mg/d | 40-240 mg/d | ||
torasemide | 5-10 mg/d | 10-20 mg/d | ||
Diuretics: Thiazide-Like | ||||
chlorthalidone | 12.5-25 mg/d | 25-100 mg/d | ||
hydrochlorothiazide | 25 mg/d | 12.5-100 mg/d | ||
indapamide | 2.5 mg/d | 2.5-5 mg/d | ||
Diuretics: Potassium-Sparing | ||||
amiloride | 2.5 mg/d | 5-10 mg/d | ||
eplerenone | 25 mg/d | 50 mg/d | ||
spirolonactone | 12.5-25 mg/d | 50 mg/d | ||
β-Blockers | ||||
bisoprolol | 1.25 mg daily | 2.5, 3.75, 5, 7, 10 | ||
carvedilol | 3.125 mg bid | 6.25, 12.5, 25, 50 | ||
metoprolol succinate CR | 12.5-25 mg daily | 25, 50, 100, 200 | ||
Angiotensin Antagonists: ACE Inhibitors | ||||
enalapril | 2.5 mg bid | 10-20 mg bid | ||
captopril | 6.25 mg tid | 50 mg tid | ||
lisinopril | 2.5-5 mg daily | 20-35 mg daily | ||
ramipril | 2.5 mg daily | 5 mg daily | ||
trandolapril | 0.5 mg daily | 4 mg daily | ||
Angiotensin Antagonists: ARBs | ||||
candesartan | 4-8 mg daily | 32 mg daily | ||
valsartan | 40 mg bid | 160 mg bid | ||
losartan | 50 mg daily | 150 mg daily | ||
Angiotensin Antagonists: ARB/ARNI | ||||
valsartan/sacubitril | 24/26 mg bid | 97/103 mg bid | If on ACEi, need 36 hour washout period before starting | |
SGLT2 Inhibitors | ||||
Procedures
- Cardiac resynchronization therapy is indicated when LVEF<30%, LBBB, and QRS > 150ms
- Devices
- ICD if EF <35%
- CRT +/- ICD if reduced EF and LBBB
- Implantable hemodynamic monitor (CardioMEMS)
- Pulmonary artery pressure sensor
- Better than daily weights for predicting heart failure exacerbations
- Reduces hospitalizations by 30%
- Studied in HFpEF and HFrEF
- Expensive! $20k
- Surgery: see advanced therapies, below
Advanced Therapies
- Consider advanced therapies such as left ventricular assist device or cardiac transplantation when heart failure is severe and refractory
- Possible indications include:
- LVEF <25%
- End-organ dysfunction
- Recurrent hospitalizations 2x/12months unexplained
- Unable to tolerate medical therapies, including hypotension
- Diuretic refractory
- Inotropic support
- Pulmonary hypertension and right heart failure
- Six-minute walk test <300m
- Increased 1yr mortality >20%
- Renal or hepatic dysfunction
- Chronic hyponatremia <134 chronically
- Cardiac cachexia
- Unable to tolerate ADLs
Prognosis
- 30-40% of patients die within 1 year of diagnosis and 60-70% die within 5 years
- NYHA II have a 5-10% annual mortality rate
- NYHA IV have a 30--70% annual mortality rate
- MAGGIC risk score
- Estimates 1 and 3 year survival