Experimental study of sympathetic nerve on atrioventricular conduction modulation in acute inferior myocardial infarction
- VernacularTitle:右冠状动脉阻塞时交感神经对房室传导调节功能的实验研究
- Author:
Bin DONG
;
Maorong CAO
;
Furong LV
;
Na WEN
;
Hang CAI
- Publication Type:Journal Article
- Keywords:
Myocardial infarction;
Sympathetic nerves system;
Right coronary artery;
Atfioventricular node
- From:
Clinical Medicine of China
2008;24(9):891-893
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study atrioventricular conduction during right coronary artery infarction and its correlation with sympathetic nerve.Method AIMI model by ligating the fight coronary artery of denervated autonomic nervous cats was used.The A,H and V-wave were measured from the His electrode by template matching.The AA,AH,HV intervals with and without sympathetic nerve stimulation were measured respectivelv.Results The decreased percentage of AH intervals was (7±5)% vs.(14±5)% (without pacing) and (12±2)% vs.(23±7)% (with pacing) respectively in ischemia and normal after sympathetic nerve stimulation,and the decreasing amplitude were 50% and 48% respectively.Conclusion The regulating function of sympathetic nerve on atrioventricular conduction decreased after ischemia related to the right coronary artery.This decrease may be one of the mechanisms that lead to atrioventficular block after acute inferior myocardial infarction.
