Heart Failure Diagnosis and Treatment

Presentation and Diagnosis

The American College of Cardiology notes that heart failure patients present to primary care in three distinct patterns: decreased exercise tolerance with dyspnea and fatigue, fluid retention with leg or abdominal swelling, or incidentally during evaluation for other conditions 1, 2
Dyspnea is the cardinal symptom, occurring with exertion, at rest, when lying flat, or as sudden nighttime awakening, according to the European Heart Journal 3, 4
Fatigue and reduced exercise tolerance result from decreased cardiac output and skeletal muscle hypoperfusion, as stated by the American College of Cardiology 1, 3
The European Society of Cardiology recommends that a normal ECG has >90% negative predictive value for excluding left ventricular systolic dysfunction—if the ECG is completely normal, heart failure is unlikely 3, 4

The American College of Cardiology recommends a 12-lead electrocardiogram as an essential first test, with abnormalities including arrhythmias, conduction defects, left ventricular hypertrophy, or prior MI evidence 3, 5
A chest X-ray is necessary to look for cardiomegaly, pulmonary congestion, upper lung zone redistribution, interstitial/alveolar edema, and bilateral pleural effusions, as stated by the European Heart Journal 3, 4
The European Society of Cardiology recommends laboratory panels, including complete blood count, electrolytes, creatinine, BUN, fasting glucose, thyroid-stimulating hormone, and liver function tests 3, 5
B-type natriuretic peptide (BNP) or NT-proBNP levels should be checked, with elevated levels supporting the diagnosis and normal levels making heart failure unlikely, according to the American College of Cardiology 3, 4

The European Heart Journal recommends assessing volume status and initiating diuretics if fluid overload is present, with patients weighing themselves daily and increasing diuretic dose if weight increases >1.5-2.0 kg over 2 days 2, 3
The American College of Cardiology suggests initiating ACE inhibitor or ARB for patients with reduced ejection fraction, with these medications improving symptoms, slowing progression, reducing hospitalizations, and improving survival 6
Beta-blocker therapy should be started once volume status is optimized, with low dose and gradual titration, as recommended by the European Society of Cardiology 3
The American College of Cardiology recommends titrating ACE inhibitors, ARBs, beta-blockers, and aldosterone antagonists to optimal tolerated doses regardless of symptomatic improvement, as these medications reduce mortality independent of symptom relief 6, 3

The European Heart Journal recommends using the NYHA functional classification to assess severity and monitor response to treatment, with classes ranging from I (no limitation) to IV (unable to perform any activity without discomfort) 6, 1, 3
The American College of Cardiology suggests referring patients to cardiology for confirmation of diagnosis with echocardiography, consideration of coronary angiography, advanced heart failure (NYHA Class III-IV) requiring specialized management, and consideration of device therapy (ICD, CRT) 3, 5, 7