Supraventricular Tachycardia - EKG Reference This reference guide requires a paid plan Unlock quizzes, lessons and more. Sign Up Key Features 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