<unk>  <unk>  is the<unk>  of blood in a ventricle at the<unk>  of contraction, or systole, and the beginning of filling, or diastole.<unk>  is the lowest<unk>  of blood in the ventricle at any point in the cardiac cycle. The main factors that affect the<unk>  are afterload and the contractility of the heart. __TOC__
End-systolic volume
End-diastolic volume
Rate pressure product
Vascular resistance
Diastolic function
Tidal volume
Left atrial volume
Coronary perfusion pressure