The normal QT interval is ... between the RR interval. If the T wave ends past the halfway point of the RR interval, it is prolonged. Due to the effects of heart rate, the corrected QT interval ...

6,11 Heart rates ≥30 beats/min are considered normal in highly trained athletes ... until there is a non-conducted P wave with no QRS complex (figure 7). The first PR interval after the dropped beat ...

The PR interval is the time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization). The normal PR interval measures 0.12-0.20 ...