A third heart sound is created by:

a. atrial contraction.
b. ventricular contraction.
c. diastolic filling.
d. regurgitation between the right and left ventricles.


C
Diastole is a relatively passive interval until ventricular filling is almost complete. Diastole occurs when the ventricle is filling with blood from the atria; the filling sometimes produces a third heart sound, S3.

Nursing

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