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The effective aortic regurgitant orifice area varies with aortic pressure in animal models of acute aortic regurgitation. The purpose of this study was to determine whether the aortic regurgitant orifice area changes during diastole in patients with chronic aortic regurgitation.

Dynamic nature of the aortic regurgitant orifice area during diastole in patients with chronic aortic regurgitation.