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AV Nodal Reentrant Tachycardia (AVNRT)

A normal heart beats regularly anywhere from 60 to 100 times a minute. Circling excitation currents cause AVNRT and high heart rates. 

AVNRT is the most common form of atrial tachycardia in adults. Reentrant tachycardia circular excitations arise in the atrioventricular node (AV node) resulting in heart rates of 150 to 220/min. The morphological "substrate" has two different conduction velocities within the AV node (fast and slow pathways). Similar to the WPW syndrome, this results in paroxysmal tachycardia (palpitations). For this condition, the optimal treatment is sclerotherapy (ablation) of a pathway. "It is important here that the functionality of the AV node is not affected by the catheter obliteration," says Prof. Dr. T. Lewalter, considered one of the most experienced AVNRT ablation experts. Medicinal treatment of AVNRT is usually not successful. Catheter ablation offers a very good chance of recovery. "In the hands of an experienced ablation interventionist, there are only minor risks for complications of the procedure (e.g., pacemaker implantation)," says Prof. Lewalter, staff director at the Isar Heart Center in Munich.

 

An EKG with AVNRT

  Illustration: Th. Lewalter    
Isar Herz Zentrum München: EKG bei AVNRT - Rhythmuszentrum im Herzen von München
Illustration: Medtronic   

Please feel free to make an appointment regarding our Cardiac Rhythm Consultation. If material is available, please bring your ECG which shows the arrhythmia (seizure ECG or long term Holter-ECG monitoring) to the appointment.

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