Two, 20, 90 and 180 minutes after ligature,early and late diastolic velocities ( V E and V A) as well as systolic velocities ( V S) of left ventricular anterior septum walls were determined by DTI.

• 于结扎后 2、2 0、90、180min ,用DTI技术测定前间壁收缩期运动速度 (VS)、舒张早、晚期运动速度 (VE、VA) ;