Which set of signs is most characteristic of left-sided heart failure?

• A. Jugular venous distension
• B. Peripheral edema and hepatomegaly
• C. Ascites
• D. Dyspnea, orthopnea, paroxysmal nocturnal dyspnea, crackles, pulmonary edema, and fatigue

Answer: (D)

Left-sided heart failure primarily causes pulmonary congestion. When the left ventricle can’t pump effectively, pressure backs up into the left atrium and then into the pulmonary veins, raising hydrostatic pressure in the pulmonary capillaries. Fluid leaks into the interstitial and alveolar spaces, leading to shortness of breath (dyspnea) and, especially when lying flat, orthopnea. At night this can progress to paroxysmal nocturnal dyspnea. The increased lung water also produces crackles on auscultation and can progress to pulmonary edema, which further worsens breathing and fatigue because oxygen exchange is impaired. This cluster of respiratory symptoms—dyspnea, orthopnea, PND, crackles, pulmonary edema—along with fatigue, is the classic presentation of left-sided heart failure.

In contrast, signs like jugular venous distension, peripheral edema, hepatomegaly, and ascites reflect venous backing in the systemic circuit and are more characteristic of right-sided (or biventricular) failure. They stem from congestion of the body’s veins rather than the lungs.