Cardiac Cycle

Cardiac output is how much blood is pumped by the heart by the right and left ventricle per minute. Cardiac outflow is directly related to the quantity of blood pumped to various parts of the body to meet the demands for maintainest and tissue perfusion.

If the heart rate becomes too slow or too fast cardiac out will drop and not be able to maintain adequate perfusion.

If the heart is damaged or can not function properly;y the cardiac output is affected and in turn, so is the quantity of blood that can be pumped to the lungs and the body.

Cardiac output is calculated by the following equation.

Cardiac out put= stroke volume x heart rate

CO = SV X HR

Units
CO – ml per minute (ml/min)
SV – ml or l
HR – Beats per Minute (bpm)

Stroke volume is the amount of blood pumped out of each ventricle when the heartbeats.

Heart rate is the number of times the heart beats in a minute.