T wave alternans can decrease after coronary revascularization.

Abstract:

:Clinical observations and animal experiments indicate that T wave alternans (TWA) is associated with an increased propensity for ventricular fibrillation, and thus it may be considered as a noninvasive marker of life-threatening ventricular arrhythmias. There is substantial evidence indicating that TWA is an intrinsic property of ischemic myocardium. This study was performed to determine the role of percutaneous transluminal coronary angioplasty (PTCA)-induced myocardial ischemia in the development of TWA and the effects of revascularization. The authors recorded bipolar X, Y, and Z leads of 111 consecutive patients (mean age: 56 years) undergoing PTCA before, during, and 24 hours after the procedure. T wave alternans signal was calculated in 97 patients (43 left anterior descending, 26 right coronary artery, and 28 circumflex or major obtuse margin branch) by fast Fourier transformation technique after signal processing. Twenty-four hours after the procedure, the mean and peak X, Y, and Z values for TWA had all been significantly reduced from baseline and during balloon inflation (p<0.01). The findings point out that induced ischemia could be a trigger for T wave alternans, and successful revascularization can reduce alternans.

journal_name

Angiology

journal_title

Angiology

authors

Batur MK,Oto A,Ider Z,Aksöyek S,Kabakci G,Ovünç K,Tokgözoglu L,Ozmen F

subject

Has Abstract

pub_date

2000-08-01 00:00:00

pages

677-87

issue

8

eissn

0003-3197

issn

1940-1574

journal_volume

51

pub_type

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