Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 41 2 2003 06 15 94 99 Moradmand S Moosavi M Nematipour E Eslami M Gharouni M Balali R Abdolmotallebi F 2015 09 28 Ramadan fasting is one of the most important religious duties of Muslims, that its effect on the heart has not been determined yet. Our objective was to evaluate the effect of Ramadan fasting on ventricular repolarization as assessed by QT interval, corrected QT interval, QT dispersion or corrected QT dispersion. Sixthy healthy subjects aged 20 to 35 years were dispersion included in this study. QT interval, corrected QT interval (QTc) QT dispersion QTc dispersion, RR interval and QRS axis were measured in 12-lead surface electrocardiogram, once during fasting (10 to 11.5 hours of absolute fasting from food and liquid) and another time, 15 tp 60 minutes after eating food at sunset, All of the subjects had been fasting 11 to 12 hours each day at least for 25 days during Ramadan. The study was performed at Amir Alam hospital in the year 2000. Maximal QT interval, mean QT interval and RR-interval, were longer during fasting (P https://acta.tums.ac.ir/index.php/acta/article/view/2642 https://acta.tums.ac.ir/index.php/acta/article/download/2642/2624