Effect of electroacupuncture on electrophysiological characteristics of ventricular myocardium during myocardial ischemia-reperfusion in rats
10.3760/cma.j.cn131073.20191010.00412
- VernacularTitle:电针对大鼠心肌缺血再灌注时心肌电生理特性的影响
- Author:
Jian TANG
1
;
Yanqiu LIU
;
Hong GAO
;
Wenxin REN
;
Suisui HUANG
;
Guilong WANG
;
Youqin HE
Author Information
1. 贵州医科大学麻醉学院，贵阳 550004
- From:
Chinese Journal of Anesthesiology
2020;40(4):433-436
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of electroacupuncture (EA) on electrophysiological characteristics of ventricular myocardium during myocardial ischemia-reperfusion (I/R) in rats.Methods:Twenty-four clean-grade healthy adult male Sprague-Dawley rats, weighing 280-320 g, were divided into 3 groups ( n=8 each) using a random number table method: sham operation group (group SH), I/R group and group EA.The model of myocardial I/R injury was established by ligating the left anterior descending branch of coronary artery for 30 min followed by 30-min reperfusion in anesthetized rats.Bilateral Neiguan acupoints in forelimbs were stimulated for 30 min during the period of reperfusion in group EA.Heart rate (HR), monophasic action potential amplitude (MAPA), maximum depolarization rate (V max), and monophasic action potential duration at 90% repolarization (MAPD 90) were recorded.The development of arrhythmias and arrhythmias score were recorded during reperfusion. Results:Compared with group SH, HR was significantly decreased, MAPA and V max were decreased, MAPD 90 was prolonged, and the incidence of ventricular premature beat, ventricular tachycardia and ventricular fibrillation and arrhythmias score were increased at T 1, 2 in I/R and EA groups ( P<0.05). Compared with group I/R, HR was significantly increased, MAPA and V max were increased, MAPD 90 was shortened, and the incidence of ventricular tachycardia and ventricular fibrillation and arrhythmias score were decreased at T 2 in EA group ( P<0.05). Conclusion:EA can accelerate myocardial depolarization and shorten repolarization, thus decreasing the occurrence of reperfusion arrhythmia in rats.
