Aortic regurgitation is a serious disorder that can challenge the best
clinicians in terms of both diagnosis and management. The chronic for
m requires valve replacement when patients have symptoms or show evide
nce of left ventricular dysfunction. The acute form requires urgent ao
rtic valve replacement. In all cases, medical management is only a tem
porizing procedure that can potentially mask the progression of left v
entricular dysfunction. Endocarditis prophylaxis for indicated procedu
res is mandatory for all patients.