Permanent junctional re-entry tachycardia. A multicentre long-term follow-up study in infants, children and young adults.

Permanent junctional re-entry tachycardia is a relatively uncommon form of re-entry tachycardia with antegrade conduction occurring through the atrioventricular node and retrograde conduction over an accessory pathway usually located in the postero-septal region. It was the aim of the study to investigate the course of permanent junctional re-entry tachycardia with particular regard to the effectiveness of pharmacological treatment and ablation procedures; evaluation was performed with respect to the patient's symptoms, tachycardia rate, frequency of the tachycardia and left ventricular function.