喷血分数常被用于测定心脏病人的左室功能,然而在二尖瓣反流的病人此法对左室功能的估价可能偏高。等张运动能增加心脏的后负荷而被用作为应激试验。本研究的目的是用侵入性方法评定等张运动对揭示二尖瓣反流患者左室功能不全的价值。其次,是了解后负荷应激试验在预示二尖瓣换置术对心室功能影响方面的价值。方法:二尖瓣反流组为15例中度至重度二尖瓣反流者,平均年龄是55±5岁,男性8例,女性7例;对照组为9例正常者,平均年龄是44±11岁,男性4例,女性5例。二尖瓣反流组中,10例手术前 Spraying scores are often used to measure left ventricular function in patients with heart disease, however, in patients with mitral regurgitation, the assessment of left ventricular function may be high. Isometric exercise can increase the heart’s afterload and is used as a stress test. The aim of this study was to evaluate the value of isometric exercise in an invasive approach to reveal LV dysfunction in patients with mitral regurgitation. Second, to understand the post-stress stress test predicts the value of mitral valve replacement on ventricular function. Methods: Mitral regurgitation was performed in 15 patients with moderate to severe mitral regurgitation. The mean age was 55 ± 5 years. There were 8 males and 7 females. The average age of the control group was 9 ± 11 years old, 4 males and 5 females. Mitral regurgitation group, 10 cases before surgery