DOI: 10.36347/sjams.2016.v04i08.083

Pages: 3154-3157

The QT interval on the electrocardiogram (ECG) has gained clinical importance Prolongation of QT interval can predispose a person to fatal ventricular arrhythmia. Clinical and experimental studies suggest that QTc is longer in women than in men. Exercise is believed to effect the QT interval in both gender .But not many studies has been done with regard to QT & QTc interval in relation to exercise and gender The aim of this study is to compare the QT & QTc interval between male & female 1. Before start of exercise, i.e basal ECG 2. Immediately after exercise and 3.fifteen minutes after exercise . Fourty nine healthy subjects of both genders in the age group 17-22 years were selected for the study. ECG was recorded before exercise, immediately after exercise and 15 minutes after exercise with bicycle ergometer. The data was analysed in SPSS version 20 and their statistical significance was noted using student ‘t’ test with P <0.05 taken as significant. Under basal condition- QT interval did not not show any gender difference but basal QTc was significantly longer (p<0.05) in females than in males .Immediately after exercise - these parameters did not show any significant differences in both the groups. However 15 mins after exercise i.e during the recovery phase - QTc showed significant increase in females (p <0.05) compared to males. These gender differences in cardiac activity are supposed to be due to action of sex hormones.