title: "Nodoventricular" accessory pathway: evidence for a distinct accessory atrioventricular pathway with atrioventricular node-like properties.
abstract: Two patients are described with recurrent pre-excited tachycardia and electrophysiologic characteristics typically ascribed to a nodoventricular accessory connection. The accessory pathway in each case demonstrated rate-dependent prolongation of conduction time and a low right ventricular insertion site; it was associated with a left bundle branch block configuration during pre-excitation. Intraoperatively, the pathway was demonstrated to originate at the anterior right atrioventricular (AV) anulus and not at the AV node. These data suggest that a "typical" nodoventricular pathway, by electrophysiologic criteria, may in fact be an AV pathway with AV node-like conduction properties and a distal right ventricular insertion site.
mesh_terms: D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000294:innervation; D006801:Humans; D007430:Intraoperative Care; D008297:Male; D011226:Pre-Excitation Syndromes / Q000503:physiopathology*; D011227:Pre-Excitation, Mahaim-Type / Q000503:physiopathology* / Q000601:surgery; D012008:Recurrence; D013610:Tachycardia / Q000503:physiopathology* / Q000601:surgery; D013617:Tachycardia, Supraventricular / Q000503:physiopathology / Q000601:surgery