Stroke volume is the amount of blood pumped from the ventricles of the heart with each contraction. It is a crucial factor in determining cardiac output, which is the total volume of blood pumped by the heart per minute. Stroke volume is an important concept in understanding the heart's ability to effectively circulate blood throughout the body. In cardiovascular physiology, stroke volume (SV) is the volume of blood pumped from the ventricle per beat. VTI can be used for various volume calculations, such as calculation of stroke volume. Stroke volume (SV), cardiac output (CO) and cardiac index (CI) Stroke volume is the amount of blood ejected into the aorta during systole. Stroke volume is calculated by measuring the Doppler flow in the aortic valve. The definition of stroke volume is the volume of blood pumped out of the heart's left ventricle during each systolic cardiac contraction. The average stroke volume of a 70 kg male is 70 mL. Not all the blood that fills the heart by the end of diastole (end-diastolic volume - EDV) can be ejected from the heart during systole.