Stegun (editors

We read with great interest the article entitled ‘A 24-hour ambula-tory ECG monitoring in assessment of QT interval duration and disper-sion in rowers with physiological myocardial hypertrophy ’ by Lutfullin IY et al. [1] published in the Biology of Sport journal. In the study, the effects of myocardial hypertrophy on cardiac repolarization parameters were investigated in endurance athletes using both 12-lead ECG and 24-hour ECG monitoring. In the conclusion of the article, it was stated that myocardial hypertrophy observed in athletes does not lead to an increase in corrected QT interval (QTIc) duration, QT dispersion (QTd) or corrected QT dispersion (QTcd). QT inter-val (QTI) duration was found to be increased in athletes with myo-cardial hypertrophy, but it was attributed to the increased vagal tone of the endurance athletes. Regular intensive training may lead to cardiac hypertrophy known as athlete’s heart. Athlete’s heart is associated with alterations i