论文部分内容阅读
复极后不应期(Postrepolarization refractoriness)并非是一个全新概念,早在1974年,Gettes就已注意并观察到这一心电现象。近年来,对其研究更加深入,并有了显著进展。[定义]正常心肌或心肌细胞的复极常与其不应期同时结束,但缺血心肌却不如此,即兴奋性的恢复明显滞后于复极结束。顾名思义,在复极完成后,心肌细胞仍处于不应期的时间段即为复极后不应期对心房肌和心室肌均为如此。[复极后不应期的发生]对房室结细胞,复极后不应期属于一种生理现象,并经腺苷介导可以更延长
Postrepolarization refractoriness is not a new concept. As early as 1974, Gettes noticed and observed this electrocardiogram. In recent years, its research has been further deepened and remarkable progress has been made. [Definition] The repolarization of normal myocardium or cardiomyocytes ends with its refractory period, but not in ischemic myocardium, ie the recovery of excitability lags far behind that of repolarization. As the name implies, after repolarization is completed, myocardial cells are still in refractory period of time that is repolarization refractory period of atrial and ventricular muscles are so. [Repolarization refractory period of occurrence] atrioventricular node cells, repolarization refractory period is a physiological phenomenon, and adenosine mediated can be more prolonged