Heart Failure Evaluation and Management

Primary Causes and Evaluation Approach

• Coronary artery disease is the dominant cause of heart failure, accounting for approximately two-thirds of cases with left ventricular systolic dysfunction, making ischemic evaluation essential in every heart failure workup, as recommended by the American College of Cardiology 1, 2
• Ischemic heart disease represents approximately 40% of heart failure cases globally and is the single most common etiology, according to the American Heart Association 3
• The American College of Cardiology recommends a comprehensive echocardiographic evaluation to assess left ventricular ejection fraction, chamber size, ventricular mass, valvular abnormalities, cardiac hypertrophy, diastolic filling patterns, and severity of structural remodeling 4, 5, 6

Initial Evaluation and Diagnostic Testing

• The American Family Physician recommends initial laboratory evaluation, including complete blood count, urinalysis, fasting lipid profile, liver function tests, serum electrolytes, blood urea nitrogen, serum creatinine, fasting glucose, and thyroid-stimulating hormone 8
• The American College of Cardiology recommends cardiac imaging, including echocardiography, as the diagnostic standard, with alternative imaging modalities such as magnetic resonance imaging and computed tomography when indicated 4, 5, 6
• B-type natriuretic peptide (BNP) or N-terminal pro-BNP (NT-proBNP) measurement is useful when clinical uncertainty exists, as recommended by the American Family Physician, with high negative predictive value for ruling out heart failure 8, 9

Serial Evaluation and Monitoring

• Serial monitoring must include renal function testing and serum electrolytes, as these guide diuretic therapy and detect medication-related complications, according to the American Family Physician 8
• Repeat echocardiography is indicated when there is a change in clinical status, patient experiences or recovers from a clinical event, or treatment that might significantly affect cardiac function has been administered, as recommended by the American College of Cardiology 4, 5, 6

Critical Clinical Pitfalls to Avoid

• The American College of Cardiology warns against dismissing heart failure based solely on absence of peripheral edema or pulmonary rales, as these signs may be absent in early stages or well-treated patients 9
• The American Heart Association emphasizes the importance of identifying the underlying cause of heart failure, as specific etiologies require targeted treatments beyond standard heart failure management 7