EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -Diastole is the period of the cardiac cycle that encompasses ventricular relaxation, passive and active filling of blood into the heart, and the period just prior to ejection. At the cellular level, the interplay of calcium within the cardiac myocytes is crucial to ventricular relaxation.

Detailed explanation-3: -Filling Phase In diastole, both the atria and the ventricles are relaxed. Blood flows from the vena cava and pulmonary veins into the right and left atria respectively, before flowing directly into the ventricles.

Detailed explanation-4: -What is the Goal of Diastole? Diastole occurs in order for the left ventricle (LV) to fill adequately with enough blood, at a low enough pressure, to prevent pulmonary congestion from occurring. This process is referred to as, diastolic function.