Pulmonary edema is most closely associated with which type of heart failure?

• A. Right-sided
• B. Left-sided
• C. Biventricular
• D. Congenital

Answer: (B)

Pulmonary edema arises when the left side of the heart can’t effectively move blood forward, causing a backup of pressure into the left atrium and pulmonary veins. This raises the hydrostatic pressure in the pulmonary capillaries, pushing fluid into the interstitial and alveolar spaces and impairing gas exchange. That classic buildup of fluid in the lungs is the hallmark of left-sided heart failure. By contrast, right-sided failure mainly causes systemic venous congestion (peripheral edema, distended neck veins, hepatomegaly, ascites) rather than fluid accumulating in the lungs. If both sides are failing (biventricular), you can see a mix, but the direct link to pulmonary edema is with left-sided heart failure.