Case 1: Diagnosis and Management of New-Onset Heart Failure With Reduced Ejection Fraction
A 54-year-old woman presented to the telemetry floor with shortness of breath (SOB) for 4 months that progressed to an extent that she was unable to perform daily activities. She also used 3 pillows to sleep and often woke up from sleep due to difficulty catching her breath. Her medical history included hypertension, dyslipidemia, diabetes mellitus, and history of triple bypass surgery 4 years ago. Her current home medications included aspirin, atorvastatin, amlodipine, and metformin. No significant social or family history was noted. Her vital signs were stable. Physical examination showed bilateral diffuse crackles in lungs, elevated jugular venous pressure, and 2+ pitting lower extremity edema. ECG showed normal sinus rhythm with left ventricular hypertrophy. Chest x-ray showed vascular congestion. Laboratory results showed a pro-B-type natriuretic peptide (pro-BNP) level of 874 pg/mL and troponin level of 0.22 ng/mL. Thyroid panel was normal. An echocardiogram demonstrated systolic dysfunction, mild mitral regurgitation, a dilated left atrium, and an ejection fraction (EF) of 33%. How would you manage this case?
In this case, a patient with known history of coronary artery disease presented with worsening of shortness of breath with lower extremity edema and jugular venous distension along with crackles in the lung. The sign and symptoms along with labs and imaging findings point to diagnosis of heart failure with reduced EF (HFrEF). She should be treated with diuretics and guideline-directed medical therapy for congestive heart failure (CHF). Telemetry monitoring for arrythmia should be performed, especially with structural heart disease. Electrolyte and urine output monitoring should be continued.
In the initial evaluation of patients who present with signs and symptoms of heart failure, pro-BNP level measurement may be used as both a diagnostic and prognostic tool. Based on left ventricular EF (LVEF), heart failure is classified into heart failure with preserved EF (HFpEF) if LVEF is >50%, HFrEF if LVEF is <40%, and heart failure with mid-range EF (HFmEF) if LVEF is 40% to 50%. All patients with symptomatic heart failure should be started on an angiotensin-converting enzyme (ACE) inhibitor (or angiotensin receptor blocker if ACE inhibitor is not tolerated) and β-blocker, as appropriate. In addition, in patients with New York Heart Association functional classes II through IV, an aldosterone antagonist should be prescribed. In African American patients, hydralazine and nitrates should be added. Recent recommendations also recommend starting an angiotensin receptor-neprilysin inhibitor (ARNI) in patients who are symptomatic on ACE inhibitors.
Alternatively, ARNI could be started instead of ACE inhibitors or ARBs. Loop diuretics may be added to relieve symptoms of congestion. They help in improving quality of life by decreasing fluid retention and thus relieving symptoms but have shown no mortality benefit. Medications should be started at low doses and gradually titrated up to recommended target doses. Digoxin can also ...