A Case of Severe Aortic Regurgitation Caused by Takayasu's Arteritis Showing End-Diastolic Opening of Aortic Valve

• Diastolic opening of the AV rarely occurs in severe AR. • Echocardiography plays a role in evaluation of the unique hemodynamics of severe AR. • A patient with Takayasu’s arteritis showed diastolic opening of the AV. • Serial echocardiographic findings suggested unique hemodynamics in this patient.