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期外收缩后的心动增强,通过血管造影术可用以确定左心室机能不全的可逆区。收缩时间间期(STI)测定是一种研究左心室机能的非创伤性方法,可检出各次心搏左心室作工的变化,也完全适用于异位搏动后心动增强的研究。本文报道在一组左心室机能不全的病人,观察过早搏动后心动增强对STI的影响。方法。48例进行心血管造影检查的患者,先经右心室导管电刺激产生不同联律的过早搏动。在过早搏动前及过早搏动期间测
Extra-systolic cardiac augmentation may be used to determine the reversible area of left ventricular insufficiency by angiography. The systolic time interval (STI) is a noninvasive method of studying left ventricular function that detects changes in left ventricular work during each heart beat and is also well-suited for studies of echocardiography after ectopic beats. This article reports the effects of cardiac augmentation on STI in a cohort of patients with left ventricular insufficiency. method. Forty-eight patients undergoing cardiovascular angiography were prematurely pulsed with different canines by electrical stimulation of the right ventricular catheter. Measured before premature beats and premature beats