Effects of Potassium Aspartate and Magnesium on Ventricular Arrhythmia in Ischemia-reperfusion Rabbit Heart  

作　　者：卜军 张存泰 全小庆 赵国安 吕家高 李波 白融 刘念 阮燕菲 何奔 

机构地区：[1]Department of Cardiology, Renji Hospital, Shanghai Jiaotong University School of Medicine [2]Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology [3]Department of Cardiology, the Third Affiliated Hospital, Xinxiang Medical College

出　　处：《Journal of Huazhong University of Science and Technology(Medical Sciences)》2008年第5期517-519,共3页华中科技大学学报（医学英德文版）

基　　金：grants from the National Natural Sciences Foundation of China (No. 30770879, 30370573, 30470714).

摘　　要：The aim of this study was to determine if the potassium aspartate and magnesium （PAM） prevent reperfusion-induced ventricular arrhythmias （RIVA） in ischemia-reperfusion （IR） rabbit heart. Thirty rabbits were randomly divided into control, ischemia and PAM groups. Arterially-perfused rabbit left ventricular preparations were made, and transmural ECG as well as action potentials from both endocardium and epicardium were simultaneously recorded in the whole process of all experiments. In control group rabbit ventricular wedge preparations were continuously perfused with Tyrode＇s solution, and in ischemia group and PAM groups the perfusion of Tyrode＇s solution was stopped for 30 min. Then the ischemia group was reperfused with Tyrode＇s solution and the PAM group with Tyrode＇s solution containing 2.42 mg/L PAM, respectively. ECG, QT interval, transmural repolarization dispersion （TDR） and action potentials from epicardium and endocardium were simultaneously recorded, and the RIVA of the wedge preparation was observed. Compared with control group, TDR and incidence of RIVA were significantly increased in ischemia group （P〈0.05）. The incidence of RIVA in control, ischemia and PAM group was 0/10, 9/10 and 1/10, respectively. Compared with ischemia group, TDR and incidence of RIVA were significantly reduced in PAM group （P〈0.05）. Potassium aspartate and magnesium significantly reduce TDR and prevent ventricular arrhythmia in ischemic rabbit heart.The aim of this study was to determine if the potassium aspartate and magnesium （PAM） prevent reperfusion-induced ventricular arrhythmias （RIVA） in ischemia-reperfusion （IR） rabbit heart. Thirty rabbits were randomly divided into control, ischemia and PAM groups. Arterially-perfused rabbit left ventricular preparations were made, and transmural ECG as well as action potentials from both endocardium and epicardium were simultaneously recorded in the whole process of all experiments. In control group rabbit ventricular wedge preparations were continuously perfused with Tyrode＇s solution, and in ischemia group and PAM groups the perfusion of Tyrode＇s solution was stopped for 30 min. Then the ischemia group was reperfused with Tyrode＇s solution and the PAM group with Tyrode＇s solution containing 2.42 mg/L PAM, respectively. ECG, QT interval, transmural repolarization dispersion （TDR） and action potentials from epicardium and endocardium were simultaneously recorded, and the RIVA of the wedge preparation was observed. Compared with control group, TDR and incidence of RIVA were significantly increased in ischemia group （P〈0.05）. The incidence of RIVA in control, ischemia and PAM group was 0/10, 9/10 and 1/10, respectively. Compared with ischemia group, TDR and incidence of RIVA were significantly reduced in PAM group （P〈0.05）. Potassium aspartate and magnesium significantly reduce TDR and prevent ventricular arrhythmia in ischemic rabbit heart.

关 键 词：ISCHEMIA-REPERFUSION ventricular arrhythmia potassium aspartate and magnesium 

分 类 号：R541.7[医药卫生—心血管疾病] R542.2[医药卫生—内科学]