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Cardiology
Heart symbol
This article is part of a series.
Investigations
Physical examination
Electrocardiography
Imaging techniques
Stress testing
Tilt testing
Cardiac catherization
Conditions
Cardiac arrhythmias
Congenital heart disease
Endocardial disease
Heart failure
Ischaemic heart disease
Pericardial diasease
Valvular heart disease
Vascular disease
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Aortic insufficiency (AI), also known as aortic regurgitation, is a type of heart valve disease in which the leaking of the heart's aortic valve results in the backflow of blood from the aorta into the left ventricle during ventricular diastole.