Supraventricular Tachycardia - EKG Reference Caliper Time Interval: ___ seconds RhythmRegular RateFast (150-250 bpm) P WaveMerged with T wave PR IntervalNormal (0.12 sec) QRSNormal (.10 sec) NotesPR interval can be difficult to measure Quick Links Sinus Atrial Junctional Ventricular Atrioventricular Pacemaker All