Title :
Effect of coronary bypass surgery on QT interval dispersion as a measure of ventricular repolarization inhomogeneity
Author :
Kaik, Jüri ; Lass, Jaanus ; Hinrikus, Hiie ; Meigas, Kalju ; Graf, Aita ; Kaik, Veera ; Sulling, Toomas
Author_Institution :
Estonian Inst. of Cardiology, Tallinn, Estonia
Abstract :
Assessment of QT interval dispersion, measured from standard 12-lead ECG and reflecting ventricular repolarization prolongation and inhomogeneity has proved to a sensitive method for identification of increased sudden death patients with coronary artery disease. The aim of the present study was to evaluate the effect of successful coronary artery bypass grafting (CABG) on the following repolarization parameters-QT interval dispersion (PTD), QT apex interval dispersion (QTaD) and QTc interval duration. The measurement were performed prior to and after CABG in 23 post-myocardial infarction patients. Statistically significant reduction of mean QTD and QTaD values was recorded after coronary bypass surgery. Thus, successful myocardial revascularization decreases myocardial electrical instability assessed by QT interval dispersion recordings
Keywords :
electrocardiography; surgery; ECG; QT interval dispersion recordings; coronary artery disease patients; coronary bypass surgery; electrodiagnostics; myocardial electrical instability; repolarization parameters; standard 12-lead ECG; successful coronary artery bypass grafting; sudden death; ventricular repolarization inhomogeneity; Arteries; Cardiac disease; Cardiology; Coronary arteriosclerosis; Dispersion; Electrocardiography; Heart rate interval; Measurement standards; Myocardium; Surgery;
Conference_Titel :
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6465-1
DOI :
10.1109/IEMBS.2000.897864
