Experimental study on the accuracy of locating the origins of various ventricular tachycardia by pacingChinese Full Text

HE Yong, DU Ri ying, ZHENG Qiang sun, GAO Min jun, WANG Yi (Departerment of Cardiology, Tangtu Hospital, Fourth Military Medical University, Xi’an shaanxi 710038,China)

Abstract: AIM:To investigate the accuracy of locating the origins of various ventricular tachycardia（VT） by pacing. METHODS:the pacemaker ECGs were recorded on 21 sites of which were 7 in the epicardium, 7 in the myocardium and 7 in the endocardium, in each of the 10 dogs tested, and the results were compared with those of the same sites obtained after the anterior interventricular branch of left coronary artery and anastomotic branch were ligated. RESULTS: It was found that the differences between these two groups of the pacemaker ECGs were marked. The pacemaker ECGs on all the sites of different layers were markedly different from one another before the ligation . However, the pacemaker ECGs on the sites in and around the infarcted zone were similar, and so were those on the different layers of one site. CONCLUSION: The localization of the origin of idiopathic VT by pacing was fairly accurate. On the contrary, the localization of the origin of VT after myocardial infarction by pacing was not accurate enough, and neither was that by the surface ECG. The regulation for locating the origins in idiopathic VT by surface ECG is not applicable to VT after myocardial infarction.

Keywords：

pacing map; myocardial infarction; ventricular tachycardia; dog;

DOI：
10.13191/j.chj.2001.06.8.hey.003
Series：
Subject：
Classification Code：
R540.4

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Experimental study on the accuracy of locating the origins of various ventricular tachycardia by pacingChinese Full Text

HE Yong, DU Ri ying, ZHENG Qiang sun, GAO Min jun, WANG Yi (Departerment of Cardiology, Tangtu Hospital, Fourth Military Medical University, Xi’an shaanxi 710038,China)

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