Dr. Daniel Kim

Supraventricular tachycardia (SVT) is a dysrhythmia characterized by abrupt onset, regular rate that usually exceeds 150 beats/minute, and lack of identifiable P waves on ECG. SVT is caused by an abnormal circuit that allows a wave of depolarization to repeatedly travel in circular fashion in cardiac tissue via a reentry circuit that may reside in the atrioventricular (AV) node or outside the AV node in an accessory pathway.