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Mahnoosh Foroughi
Arash Ghanavati
Seyed-Ahmad Hassantash
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ORIGINAL ARTICLE

Prolonged QT Interval and Coronary Artery Bypass Mortality due to Heart Failure

Mahnoosh Foroughi, MD, Zohreh Karkhaneh Yousefi, MD, Masood Majidi Tehrani, MD, Azam Noori Foroutaghe, BSc, Arash Ghanavati, MD, Seyed-Ahmad Hassantash, MD

Modarres Cardiovascular Research Center and Department of Cardiovascular Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Mahnoosh Foroughi, MD, Tel: +9821 22083106, Fax: +9821 22083106, Email: mahnoosh.foroughi{at}gmail.com, Department of Cardiovascular Surgery, Shahid Modarres Medical Center, Saadat-Abad, Tehran, 1998734383, Iran.

ABSTRACT

QT-interval prolongation has been shown to predict mortality in coronary artery disease and heart failure. To assess the prognostic value of QT interval for death due to low cardiac output after coronary artery bypass grafting, the QT interval was measured in 3 consecutive beats on the preoperative electrocardiogram (leads II and V4) in 30 patients who died perioperatively due to heart failure and a control group of 168 randomly matched hospital survivors during the same 3-year period. Mean corrected QT interval was significantly longer in the patients who died compared to the control group (480.7 ± 96.2 vs. 425.4 ± 21 ms). Among the variables evaluated, QT prolongation was the only independent predictor of perioperative death. In patients admitted for coronary artery bypass grafting, QT interval measurement is a simple clinical tool that may identify patients with a greater probability of a troublesome operative course.

Key Words: Low Cardiac Output • Coronary Artery Bypass • Electrocardiography • Hospital Mortality

Asian Cardiovasc Thorac Ann 2009; 17:604-607
© 2009 by SAGE Publications
DOI: 10.1177/0218492309349068




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