THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -End-systolic volume (ESV) is the volume of blood in a ventricle at the end of contraction, or systole, and the beginning of filling, or diastole. ESV is the lowest volume of blood in the ventricle at any point in the cardiac cycle.

Detailed explanation-2: -A small volume of blood flows directly into the ventricles from the venae cavae. Towards the end of ventricular diastole, any residual blood in the atria is pumped into the ventricle. The total volume of blood present in the ventricle at the end of diastole is called the end-diastolic volume or preload.

Detailed explanation-3: -Cardiac cycle events can be divided into diastole and systole. Diastole represents ventricular filling, and systole represents ventricular contraction/ejection. Systole and diastole occur in both the right and left heart, though with very different pressures (see hemodynamics below).

Detailed explanation-4: -Recall that the end diastolic volume (EDV) and end systolic volume (ESV) of the heart’s left ventricle refer to the volume (in mL) of blood just prior to the heart beat and at the end of the heart beat, respectively.