Among patients with chronic heart failure, those with a left ventricular ejection fraction (LVEF) ≤40% are considered to have heart failure with reduced ejection fraction (HFrEF). Patients with a LVEF ≥50% are considered to have heart failure with preserved ejection fraction (HFpEF). Those with a LVEF of 41-49% are an intermediate group more similar to patients with HFpEF.

The FDA has approved vericiguat (Verquvo – Merck), an oral soluble guanylate cyclase (sGC) stimulator, to reduce the risk of hospitalization for heart failure and cardiovascular (CV) death following a worsening heart failure event (hospitalization for heart failure or treatment with IV diuretics as an outpatient) in patients with symptomatic chronic heart failure and left ventricular ejection fraction (LVEF) <45%. Vericiguat is the second sGC stimulator to be marketed in the US. Riociguat (Adempas), which is FDA-approved for treatment of pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension, was the first.

View the Comparison Table: Some Drugs for HFrEF

Patients with a left ventricular ejection fraction (LVEF) ≤40% are considered to have heart failure with reduced ejection fraction (HFrEF). Patients with a LVEF ≤50% and symptoms of heart failure are considered to have heart failure with preserved ejection fraction (HFpEF). There is little evidence that drug treatment improves clinical outcomes in patients with HFpEF.

View the Expanded Table: Some Drugs for HFrEF

The FDA has approved Entresto (Novartis), an oral fixed-dose combination of the neprilysin inhibitor sacubitril and the angiotensin receptor blocker (ARB) valsartan, to reduce the risk of cardiovascular death and heart failure hospitalization in patients with heart failure with reduced ejection fraction. Sacubitril is the first neprilysin inhibitor to become available in the US.

The FDA has approved ivabradine (Corlanor – Amgen) to reduce the risk of hospitalization for worsening heart failure in adults with stable, symptomatic chronic heart failure with left ventricular ejection fraction (LVEF) ≤35% who are in sinus rhythm with a resting heart rate ≥70 beats per minute and who are on maximum tolerated doses of beta blockers or have a contraindication to beta blocker use. Ivabradine has been available internationally for years as Procoralan and Corlentor for treatment of stable angina and heart failure.

Heart failure is usually associated with left ventricular dysfunction. According to recent guidelines, patients with a left ventricular ejection fraction (LVEF) ≤40% are considered to have heart failure with reduced ejection fraction (HFrEF) or systolic heart failure. Patients with a LVEF ≥50% and symptoms of heart failure are considered to have heart failure with preserved ejection fraction (HFpEF) or diastolic heart failure; there is little evidence that drug treatment improves clinical outcomes in these patients. The treatment of acute heart failure is not included here.

Chronic systolic heart failure is usually associated with a left ventricular ejection fraction (LVEF) of ≤40%. Many patients with symptoms of heart failure have higher ejection fractions, but there is no evidence that drug treatment of heart failure with preserved systolic function (LVEF >40%) improves clinical outcomes. Some of the drugs commonly used now for treatment of chronic heart failure are listed in the table on page 71.

The range of drugs for treatment of chronic heart failure continues to expand. Some of those commonly used now are listed in the table on page 55. Mechanical therapies for the treatment of heart failure such as cardiac resynchronization, implanted cardiac defibrillators (ICDs), ventricular assist devices and ultrafiltration for the relief of congestion will not be reviewed here.

The choice of drugs for treatment of chronic heart failure continues to evolve. Those most commonly used now are listed in the table on page 3. The use of implanted cardiac defibrillators (ICDs) to reduce the incidence of sudden death in patients with heart failure and the treatment of decompensated heart failure were discussed in previous issues.

BiDil (NitroMed), a fixed-dose combination of isosorbide dinitrate and hydralazine, was approved by the FDA for adjunctive use in the treatment of heart failure in black patients.Both drugs are oral vasodilators that have been used together off-label for many years to treat heart failure in patients not responding to other drugs.