Which class is used for preload and afterload reduction in heart failure?

Which class is used for preload and afterload reduction in heart failure?

• A. Digoxin
• B. ACE inhibitors
• C. Anticoagulants
• D. Vasodilators

Answer: (D)

In heart failure, lowering the heart’s workload by reducing both venous return (preload) and the pressure the heart must pump against (afterload) improves cardiac output and symptoms. Vasodilators achieve this by acting on both sides of the circulation: dilating veins decreases venous return to the heart, which lowers preload and the filling pressures; dilating arteries lowers systemic vascular resistance, which decreases afterload. This dual action directly lowers the heart’s workload and helps it pump more efficiently. That’s why vasodilators are the best choice here. Digoxin mainly increases contractility without directly reducing preload or afterload; ACE inhibitors reduce afterload (and remodel the heart) but their primary, consistent effect is afterload reduction rather than preload; anticoagulants don’t affect hemodynamics.

In heart failure, lowering the heart’s workload by reducing both venous return (preload) and the pressure the heart must pump against (afterload) improves cardiac output and symptoms. Vasodilators achieve this by acting on both sides of the circulation: dilating veins decreases venous return to the heart, which lowers preload and the filling pressures; dilating arteries lowers systemic vascular resistance, which decreases afterload. This dual action directly lowers the heart’s workload and helps it pump more efficiently.

That’s why vasodilators are the best choice here. Digoxin mainly increases contractility without directly reducing preload or afterload; ACE inhibitors reduce afterload (and remodel the heart) but their primary, consistent effect is afterload reduction rather than preload; anticoagulants don’t affect hemodynamics.