Isovolumetric contraction occurs during the __________ of the electrocardiogram.
A) P wave
B) P-Q segment
C) R wave
D) S-T segment
E) T wave

Question

Quizplus · Accepted Answer

Isovolumetric contraction occurs during the R wave of the electrocardiogram. This phase corresponds to the onset of ventricular contraction, when the ventricles are contracting with no change in volume because the atrioventricular and semilunar valves are closed.

Isovolumetric Contraction Occurs During the __________ of the Electrocardiogram