How do you assess left ventricular function?

Echocardiogram. This is most commonly done with an echocardiogram, an ultrasound of the heart. It is also assessed when dye is injected into the heart at the time of a cardiac catheterization or by the injection of radioactive substances into the heart, which is commonly done as part of a stress test.
Several ways. Ventricular function represents a quantification of the heart's pumping ability. Typically 55-65% of the blood is squeezed out with each beat. This can be assessed by imaging the heart. The most common way is an echocardiogram. We sometimes perform mris of the heart, nuclear scan, or contrast ventriculography.