Heart Failure Diagnosis and Management
Diagnostic Approach
- The American College of Cardiology recommends evaluating patients with suspected heart failure through a focused history, physical examination, 12-lead ECG, and chest radiograph 1, 2
- Assess for key symptoms (dyspnea, fatigue) and signs (edema, rales) 3
- Initial laboratory evaluation should include complete blood count, urinalysis, electrolytes, BUN, creatinine, glucose, lipid profile, liver function tests, and thyroid-stimulating hormone 1
- For non-acute presentation, measure B-type natriuretic peptide (BNP) or NT-proBNP 4, 2
- Two-dimensional echocardiography with Doppler is essential to assess left ventricular ejection fraction (LVEF), chamber size, wall thickness, and valve function 1, 5
Heart Failure Classification
- The American College of Cardiology classifies heart failure into four stages: Stage A (at risk), Stage B (structural heart disease without symptoms), Stage C (structural heart disease with previous or current symptoms), and Stage D (advanced heart failure) 1
- Heart failure can also be classified by ejection fraction: HFrEF (LVEF ≤40%), HFmrEF (LVEF 41-49%), and HFpEF (LVEF ≥50%) 5
Management Strategies
- The American College of Cardiology recommends risk factor modification for Stage A patients, including ACE inhibitors or ARBs for appropriate patients (hypertension, diabetes) 1
- For Stage B patients, add ACE inhibitors or ARBs, and beta-blockers for appropriate patients (post-MI, reduced EF) 1
- For Stage C patients, add diuretics for fluid retention, beta-blockers, and aldosterone antagonists in selected patients 1
- For Stage D patients, consider advanced therapies: implantable defibrillators, ventricular assist devices, heart transplantation 1
Non-Pharmacological Management
- Daily weight monitoring and reporting weight gains >2 kg in 3 days 6
- Moderate sodium restriction 6, 8
- Regular physical activity as tolerated 6
- Smoking cessation and limited alcohol intake 6