Echocardiogram With Mild Aortic Insufficiency 

This video is of a condensed echocardiogram showing an example of mild aortic insufficiency, or regurgitation.
What is aortic regurgitation?
According to Wikipedia, "Aortic insufficiency (AI), also known as aortic regurgitation (AR), is the leaking of the aortic valve of the heart that causes blood to flow in the reverse direction during ventricular diastole, from the aorta into the left ventricle. As a consequence the cardiac muscle is forced to work harder than normal."