title: [Wide spectrum of arrhythmias, with inductions and terminations of atrio-ventricular replica-nodal tachycardia by automaticity during successful radiofrequency ablation of long anterogradely slow conducting atrio-fasciculo-ventricular accessory pathway].
abstract: Mahaim syndrome is still a challenge. The specific characteristics of the pathway, the fact that it seldom occurs, and ambiguities  about the pathophysiology and nomenclature make it, for electrophysiologists, still difficult to ablate. We present a case of a patient  with anterogradely slow conducting accessory pathway, which has been effectively ablated although M potential was not observed  nor was a mechanical conducting block of the accessory pathway. The accessory pathway showed a wide spectrum of electrophysiological  characteristics of the "AV node physiology" including inductions and terminations of atrio-ventricular replica-nodal  tachycardia by local automaticity, not only during electrophysiological study, but during successful application. The accessory  pathway presented signs of two types of pseudo Mahaim fibers: atrio-fascicular and slow conducting atrio-ventricular connection.
authors.affiliation: Klinika Zaburzeń Rytmu Serca, Instytut Kardiologii, Warszawa.
authors.forename: Robert
authors.initials: R
authors.lastname: Bodalski
authors.forename: Lukasz
authors.initials: L
authors.lastname: Szumowski
authors.forename: Franciszek
authors.initials: F
authors.lastname: Walczak
mesh_terms: D058606:Accessory Atrioventricular Bundle / Q000503:physiopathology / Q000601:surgery*; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology*; D017115:Catheter Ablation / Q000009:adverse effects*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011227:Pre-Excitation, Mahaim-Type / Q000175:diagnosis / Q000209:etiology; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis / Q000209:etiology*; D055815:Young Adult