Supraventricular Tachycardia - EKG Reference Caliper Time Interval: ___ seconds Key Features 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 Supraventricular Tachycardia EKG Reference Definition of Supraventricular Tachycardia Supraventricular tachycardia (SVT) is a cardiac arrhythmia characterized by very rapid or erratic beating. SVT is also called paroxysmal supraventricular tachycardia (PSVT). Types of Supraventricular Tachycardia Atrioventricular nodal reentrant tachycardia (AVNRT) Atrioventricular reciprocating tachycardia (AVRT) Wolff-Parkinson-White syndrome (a type of AVRT) Symptoms heart racing/palpitations dizziness or light-headedness chest pain breathlessness Quick Links Sinus Atrial Junctional Ventricular Atrioventricular Pacemaker All