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对象为甲组16例正常人和乙组31例既往心梗的病人。将探头置于心尖部获得左室长轴切面,显示前乳头肌长轴位,然后顺时钟旋转近90度,获得左室二腔切面,显示后乳头肌长轴位。乳头肌长度为从乳头肌顶点到乳头肌基部和左室壁连接处中点的距离。在同一心动图期中,测收缩末期和舒张末期前、后乳头肌最大长度,然后计算出缩短分数。
Subjects in group A 16 normal subjects and 31 cases of past myocardial infarction patients. The probe was placed in the apical long axis of the left ventricular section, showing the long axis of the anterior papillary muscle, and then clockwise rotation of nearly 90 degrees to obtain the left ventricular two-chamber section, showing the long axis of the posterior papillary muscle. The length of the papillary muscle is the distance from the apex of the papillary muscle to the midpoint of the junction of the base of the papillary muscle and the left ventricular wall. During the same cardiac phase, the maximum length of the papillary muscle was measured before the end systole and after the end diastole, and then the shortening fraction was calculated.