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Atrioventricular nodal reentrant tachycardia - UpToDate

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Atrioventricular nodal reentrant tachycardia INTRODUCTION Atrioventricular nodal reentrant tachycardia (AVNRT) is a regular supraventricular tachycardia (SVT) that results from the formation of a reentry circuit confined to the AV node and perinodal atrial tissue. Because of its abrupt onset and termination, AVNRT is categorized as a paroxysmal SVT (PSVT). As with most SVTs, the QRS complex in AVNRT is typically narrow (ie, ≤120 milliseconds), reflecting normal ventricular activation through the His-Purkinje system. However, rate-related aberrant conduction during SVT or an underlying…

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