274 The value of the research the disperssion of QT interval in the sporting teenager

Abstract

to evaluate the QT interval dispersion in adolescent athletes regarding on the type of physical effort. 51 sporting teenagers (14-17 years old) organized in 2 groups. First group: 25 endurance-trained athletes (runners, football-players) and the 2 nd group: 26 strength-trained athletes (wrestlers, boxers). Control group: 20 teenagers in the same age group, without any sign of cardiac suffering. ECGs were assessed on all the patients, athletes and non-athletes and used to calculate QT interval in three successive cardiac ECG cycles, the QT interval dispersion (QTD) (the difference between maximum and minimum value of QT interval) and the QTc interval dispersion (QTcD)(Bazzet's formula). the average values of QTD and QTcD in the 1 st and 2 nd group were superior than the values in the control group but the difference is not statistic significant. 1 st group QTD: 43,54×21,03 ms QTcD: 50.81×19.34 ms 2 nd group QTD: 48.23×12.56 ms QTcD: 53.59×17.21 ms control group QTD: 35.88×10.22 ms QTcD; 39.23×14.81 ms The highest values of QT interval were found in strength-trained sporting teenagers. The highest values of QTD and QTcD were found in sporting teenagers from the 2 nd group that it might be possible to have a higher ventricular arrhythmia risk. There wasn’t any case with QT interval value longer than the normal. At side of other parameters ECG, it is useful research screening of the QT interval and QTc interval dispersion during periodic controls, like indicator of the risk of the ventricular arrhythmias at sporting teenagers