Methods After left ventricular angiography,an outline of left ventricular image was drew in the end-systole volume(ESV)and end-diastole volume(EDV).

• 方法在左心室造影后,用轨迹法绘制左心室舒张和收缩末期容积时的轮廓线,利用面积-长度法计算左室射血分数。