Heart

Afterload

the amount of resistance to ejection of blood from the ventricle

Preload

volume of blood in ventricles at end of diastole (before contraction)

cardiac output

The volume of blood ejected from the left side of the heart in one minute.

stroke volume

The amount of blood ejected from the heart in one contraction.

ejection fraction

measurement of the volume percentage of left ventricular contents ejected with each contraction