Sisu Roxana C, Vinereanu Dragos
Department of Cardiology, University of Medicine and Pharmacy and Emergency Hospital of Bucharest, Bucharest, Romania.
Echocardiography. 2011 Apr;28(4):476-9. doi: 10.1111/j.1540-8175.2010.01323.x. Epub 2011 Mar 14.
Diastolic mitral regurgitation (DMR) has been reported in patients with AV block, aortic regurgitation, cardiomyopathies, and in patients with long filling periods in atrial tachyarrhythmias. The mechanism for DMR is a reversal in the atrioventricular gradient during diastole. However, because of its relatively low velocity, it may be difficult to diagnose noninvasively. We present three different cases of diastolic MR in 2:1 second-degree AV block, atrial flutter, and dilated cardiomyopathy, with different locations in diastole. Diastolic tricuspid regurgitation commonly accompanies DMR. Careful analysis of echocardiographical images related with online ECG is very important in order to delineate systolic and DMR, and their timing in systole and diastole.
舒张期二尖瓣反流（DMR）已在房室传导阻滞、主动脉瓣反流、心肌病患者以及房性快速心律失常时舒张期充盈时间延长的患者中被报道。DMR的机制是舒张期房室压力阶差逆转。然而，由于其速度相对较低，可能难以进行无创诊断。我们呈现了3例分别在2:1二度房室传导阻滞、心房扑动和扩张型心肌病中出现的舒张期二尖瓣反流不同病例，其舒张期反流位置各异。舒张期三尖瓣反流常伴随DMR。为了明确收缩期和舒张期二尖瓣反流及其在收缩期和舒张期的发生时间，仔细分析与同步心电图相关的超声心动图图像非常重要。
