Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).

Synonyms: Insufficiency, Aortic Valve, Regurgitation, Aortic Valve, Incompetence, Aortic Valve, Aortic Valve Incompetence, Aortic Valve Insufficiency, Incompetence, Aortic, Regurgitation, Aortic, Aortic Incompetence, Aortic Regurgitation