37. What is the optimal technique to hear the S4 heart sound on physical examination?

A. Right upper sternal border with the patient leaning forward at end expiration using the bell of the stethoscope

B. Left lower sternal border with the patient supine using the diaphragm of the stethoscope

C. Cardiac apex with the patient in the left lateral decubitus position using the bell of the stethoscope

D. Left upper sternal border at end inspiration using the diaphragm of the stethoscope

PROCEED TO ANSWER