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| IJCEM Copyright © 2008-All rights reserved. Published by e-Century Publishing Corporation, Madison, WI 53711 |
Int J Clin Exp Med 2013;6(8):688-692
Original Article
Value of the frontal planar QRS-T angle on cardiac dysfunction in patients with old
myocardial infarction
Yan-Hong Li, Xue-Jun Ren, Zhi-Hong Han, Yun-Long Wang, Ye Wang, Jin-Rong Zhang, Fang Chen
Department of Cardiology, Institute of Heart Lung and Blood Vessel Disease, Beijing Anzhen Hospital Affiliated to Capital Medical
University, Beijing 100029, China
Received July 16, 2013; Accepted August 26, 2013; Epub September 1, 2013; Published September 15, 2013
Abstract: Objectives: To explore a method of surface electrocardiogram for assessing cardiac dysfunction in patients with old
myocardial infarction. Methods: 1000 patients with old myocardial infarction in Anzhen hospital were analyzed retrospectively. The
planar QRS-T angle was calculated automatically according to QRS-wave and T-wave vectors by the electrocardiogram machine.
Results: Among these 1000 patients, 822 (82.2%) were male and 178 (17.8%) were female, the mean age was 59.3±10.5 years
(34~89 years). The average planar QRS-T angle was 88.5±50.6°. The planar QRS-T angle and LVEF was negative correlation
(r=-0.406, p<0.01), the lower the LVEF, the better the relationship with planar QRS-T angle. QRS-T angle>90° had optimal sensitivity
and specificity (76%, 74%) in diagnosis of cardiac dysfunction. Conclusion: The planar QRS-T angle and LVEF of patients with old
myocardial infarction is negative correlation, the larger the planar QRS-T angle, the lower the LVEF. The planar QRS-T angle may be an
easier and more feasible index for assessing cardiac dysfunction in patients with old myocardial infarction. (IJCEM1307010).
Keywords: Planar QRS-T angle, old myocardial infarction, cardiac dysfunction
Address correspondence to: Dr. Xue-Jun Ren, Department of Cardiology, Institute of Heart Lung and Blood Vessel Disease, Beijing
Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China. Tel: +861064456901; Fax: +861064456503; E-mail:
renxj@163.com
Original Article
Value of the frontal planar QRS-T angle on cardiac dysfunction in patients with old
myocardial infarction
Yan-Hong Li, Xue-Jun Ren, Zhi-Hong Han, Yun-Long Wang, Ye Wang, Jin-Rong Zhang, Fang Chen
Department of Cardiology, Institute of Heart Lung and Blood Vessel Disease, Beijing Anzhen Hospital Affiliated to Capital Medical
University, Beijing 100029, China
Received July 16, 2013; Accepted August 26, 2013; Epub September 1, 2013; Published September 15, 2013
Abstract: Objectives: To explore a method of surface electrocardiogram for assessing cardiac dysfunction in patients with old
myocardial infarction. Methods: 1000 patients with old myocardial infarction in Anzhen hospital were analyzed retrospectively. The
planar QRS-T angle was calculated automatically according to QRS-wave and T-wave vectors by the electrocardiogram machine.
Results: Among these 1000 patients, 822 (82.2%) were male and 178 (17.8%) were female, the mean age was 59.3±10.5 years
(34~89 years). The average planar QRS-T angle was 88.5±50.6°. The planar QRS-T angle and LVEF was negative correlation
(r=-0.406, p<0.01), the lower the LVEF, the better the relationship with planar QRS-T angle. QRS-T angle>90° had optimal sensitivity
and specificity (76%, 74%) in diagnosis of cardiac dysfunction. Conclusion: The planar QRS-T angle and LVEF of patients with old
myocardial infarction is negative correlation, the larger the planar QRS-T angle, the lower the LVEF. The planar QRS-T angle may be an
easier and more feasible index for assessing cardiac dysfunction in patients with old myocardial infarction. (IJCEM1307010).
Keywords: Planar QRS-T angle, old myocardial infarction, cardiac dysfunction
Address correspondence to: Dr. Xue-Jun Ren, Department of Cardiology, Institute of Heart Lung and Blood Vessel Disease, Beijing
Anzhen Hospital Affiliated to Capital Medical University, Beijing 100029, China. Tel: +861064456901; Fax: +861064456503; E-mail:
renxj@163.com
