Cardiac ventriculography is a medical imaging test used to determine a person's heart function in the right, or left ventricle.^[1] Cardiac ventriculography involves injecting contrast media into the heart's ventricle(s) to measure the volume of blood pumped. Cardiac ventriculography can be performed with a radionuclide in radionuclide ventriculography or with an iodine-based contrast in cardiac chamber catheterization.

Cardiac ventriculography
Left ventriculography during systole showing apical ballooning akinesis with basal hyperkinesis in a patient with takotsubo cardiomyopathy.
Purpose	test cardiac function in the right, or left ventricle.

The 3 major measurements obtained by cardiac ventriculography are:

1. Ejection Fraction
2. Stroke Volume
3. Cardiac Output

These three measurements share a commonality of ratios between end systolic volume and end diastolic volume and all lend mathematical structure to the common medical term systole.