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.
Symptoms of aortic insufficiency are similar to those of heart failure and include the following:
Paroxysmal nocturnal dyspnea
Cyanosis (in acute cases)
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