A split second heart sound is:
A) abnormal.
B) greatest at the peak of inspiration.
C) heard best after forceful expiration.
D) supposed to disappear with deep inspiration.

Question

Quizplus · Accepted Answer

Splitting of S₂ is an expected event because pressures are higher and depolarization occurs earlier on the left side of the heart. Ejection times on the right are longer, and the pulmonic valve closes a bit later than the aortic valve. Splitting of S₂ is greatest at the peak of inspiration. During expiration, the split may disappear.

A Split Second Heart Sound Is