Correlation between Vand#775;o2max tension time index and left ventricular ejection fraction as a predictor of cardiac function in athletes

Abstract

newline The goal of this study was to demonstrate in athlete, how the functioning of left ventricle is positively correlated with Vand#775;O2max, by finding their work capacity and myocardial oxygen demand at any given submaximal work. Depending on the need for oxygen by tissues, Vand#775;O2max increases with an increase in cardiac output, stroke volume, left ventricular ejection fraction and myocardial contractility as an athlete performs treadmill from moderate to maximum. newline After getting approval from institutional ethics committee and informed consent from the subject, athletes as well as non-athletes were asked to perform treadmill and ergograph. Their blood pressure, pulse, left ventricular changes was measured while their Vand#775;O2max, tension time index and left ventricular ejection fraction were calculated. Statistical analysis was done by unpaired t-test to find out the significant level. newline A significant correlation (Plt0.001) was found between Vand#775;O2max, systolic time intervals as duration of systole, left ventricular ejection time and left ventricular ejection fraction (Plt0.005) without any change in pre-ejection phase. Tension time index was more increased than Vand#775;O2max in athletes as well as non-athletes performing treadmill than ergograph. newline Thus it was concluded that increased left ventricular functional activity along with increased Vand#775;O2max can work as a screening protocol in athlete undergoing training through treadmill. Left ventricular ejection fraction and tension time index can be better predictor of left ventricular activity rather than Vand#775;O2max in athletes undergoing training, determining sports eligibility and thus be cardioprotectors. newline