Value of the frontal planar QRS-T angle on cardiac dysfunction in patients with old myocardial infarction

• Published in: International journal of clinical and experimental medicine 2013-01, Vol.6 (8), p.688-692
• Main Authors: Li, Yan-Hong, Ren, Xue-Jun, Han, Zhi-Hong, Wang, Yun-Long, Wang, Ye, Zhang, Jin-Rong, Chen, Fang
• Format: Article
• Language: English
• Subjects: Original
• ISSN: 1940-5901; 1940-5901

To explore a method of surface electrocardiogram for assessing cardiac dysfunction in patients with old myocardial infarction. 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. 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, p90° had optimal sensitivity and specificity (76%, 74%) in diagnosis of cardiac dysfunction. 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.