Effects of coronary revascularization and concomitant aneurysmectomy on QT interval duration and dispersion.
A reduction in QT dispersion (QTd) has been previously shown in patients receiving thrombolytics and undergoing coronary artery bypass grafting (CABG). The purpose of the present study was to investigate changes occurring in corrected QT intervals or QT dispersion after CABG and concomitant aneurysmectomy in the same session. The study population included 43 patients with coronary artery disease with left ventricular aneurysm (LVA). The control group included 32 patients with coronary artery disease without LVA. The study patients underwent CABG and aneurysmectomy in the same surgical session. Corrected maximum and minimum QT interval duration (QTcmax and QTcmin) and corrected QT dispersion (QTcd) were measured in the study patients before and after surgery. QTcmax and QTcd in the patients with LVA were significantly higher than in the patients without LVA (P < .001 and P < .001, respectively). QTcmax and QTcd in the patients with LVA were significantly shortened after surgery (P < .001 and P < .001, respectively). This study showed that QTcmax and QTcd values are significantly reduced after CABG and concomitant aneurysmectomy. We have suggested that coronary revascularization and left ventricular reconstruction in the same session have beneficial effects on QT interval duration and dispersion.
Department of Cardiology, Faculty of Medicine, Inonu University, Turgut Ozal Medical Center, Malatya 44069, Turkey. mferidunkosar@yahoo.com
Feridun
F
Kosar
Vedat
V
Nisanoglu
Yuksel
Y
Aksoy
Cengiz
C
Colak
Nevzat
N
Erdil
Bektas
B
Battaloglu
D000787:Angina Pectoris / Q000150:complications / Q000601:surgery*; D016009:Chi-Square Distribution; D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006322:Heart Aneurysm / Q000150:complications / Q000601:surgery*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology*