Question

Diastolic collapse of the right ventricle in cardiac tamponade occurs during:

A. Early diastole
B. Mid-diastole
C. Late diastole
D. Atrial systole

Answer 1

Diastolic collapse of the right ventricle in cardiac tamponade occurs during early diastole, or the isovolumic ventricular relaxation phase, due to impeded expansion from accumulated fluid.

Step-by-step explanation:

Diastolic collapse of the right ventricle in cardiac tamponade typically occurs during early diastole. During this phase, known as the isovolumic ventricular relaxation phase, the ventricular muscle relaxes and the pressure within the ventricles starts to decrease. If an individual has cardiac tamponade, the fluid that accumulates in the pericardial space can impede the proper expansion of the ventricles, leading to a collapse of the ventricular walls particularly during this vulnerable phase when ventricles are not yet filled with blood from the atria.