Question

A common finding in pregnancy includes:

a. S3 heart sound
b. Aortic regurgitation murmur
c. S2 heart sound
d. Mitral stenosis murmur

Answer 1

In a normal, healthy heart, there are two audible heart sounds: S1 and S2. S3, the third heart sound, may be heard in youth, some athletes, and pregnant women.

Step-by-step explanation:

In a normal, healthy heart, there are only two audible heart sounds: S1 and S2. S1 is the sound created by the closing of the atrioventricular valves during ventricular contraction and is normally described as a 'lub,' or first heart sound. The second heart sound, S2, is the sound of the closing of the semilunar valves during ventricular diastole and is described as a 'dub.'

There is a third heart sound, S3, but it is rarely heard in healthy individuals. It may be the sound of blood flowing into the atria, or blood sloshing back and forth in the ventricle, or even tensing of the chordae tendineae. S3 may be heard in youth, some athletes, and pregnant women.