Which phase of the cardiac cycle is associated with ventricular contraction?

Which phase of the cardiac cycle is associated with ventricular contraction?

• A. Systole
• B. Diastole
• C. Isovolumetric relaxation
• D. Atrial systole

Answer: (A)

Ventricular contraction occurs during systole. This is the phase when the ventricles contract to generate enough pressure to eject blood into the aorta and pulmonary artery. Systole includes isovolumetric contraction, where pressure rises with all valves closed, followed by ventricular ejection once the semilunar valves open. Diastole is when the ventricles relax and fill, atrial systole is the atria contracting to finish filling the ventricles, and is not the phase of ventricular contraction.

Ventricular contraction occurs during systole. This is the phase when the ventricles contract to generate enough pressure to eject blood into the aorta and pulmonary artery. Systole includes isovolumetric contraction, where pressure rises with all valves closed, followed by ventricular ejection once the semilunar valves open. Diastole is when the ventricles relax and fill, atrial systole is the atria contracting to finish filling the ventricles, and is not the phase of ventricular contraction.