In left-sided heart failure, which chest auscultation finding is most typical?

• A. Pulmonary crackles
• B. Peripheral edema
• C. Jugular venous distention
• D. Clear lungs with normal chest auscultation

Answer: (A)

Left-sided heart failure causes pressure to back up into the lungs, raising capillary hydrostatic pressure and pushing fluid into the interstitial space and alveoli. That fluid disrupts normal air movement and creates audible crackling sounds on inspiration, often best heard at the lung bases—these are the classic pulmonary crackles. Peripheral signs like edema or jugular venous distention relate to fluid overload elsewhere (and may indicate right-sided involvement) and aren’t auscultation findings in the lungs. Hearing clear lungs would be atypical when pulmonary edema is present, though it can occur if edema is minimal or intermittent.