influence of left ventricular relaxation on the pressure half time of aortic regurgitation

摘要

Objective-To the severity of aortic re- gurgitation can be estimated using pres- sure half time (PHT) of the aortic regurgitation flow velocity, but the corre- lation between regurgitant fraction and PHT is weak. Aim-to test the hypothesis that the Association between PHT and regurgitant Fraction is substantially influenced by left Ventricular relaxation. Methods-In 63 patients with aortic re- Gurgitation, subdivided into a group with- Out (n=22) and a group with (n=41) left Ventricular hypertrophy, aegurgitant frac- Out (n=22) and a group with (n=41) left Ventricular hypertrophy, regurgitant frac- Tion was calculated using the difference Between right and left ventricular cardiac Outputs.