{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T17:34:11Z","timestamp":1773077651013,"version":"3.50.1"},"reference-count":25,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2007,4,20]],"date-time":"2007-04-20T00:00:00Z","timestamp":1177027200000},"content-version":"vor","delay-in-days":2635,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2000,2]]},"abstract":"<jats:p>Nodofascicular and Atriofascicular Pathway Ablation. <jats:italic>Introduction:<\/jats:italic> True nodoventricular or nodofascicular pathways and left\u2010sided anterograde decremental accessory pathways (APs) are considered rare findings.<\/jats:p><jats:p> <jats:italic>Methods and Results:<\/jats:italic> Two unusual patients with paroxysmal supraventricular tachycardia were referred for radiofrequency (RF) ablation. Both patients had evidence of dual AV nodal conduction. In case 1, programmed atrial and ventricular stimulation induced regular tachycardia with a narrow QRS complex or episodes of right and left bundle branch block not altering the tachycardia cycle length and long concentric ventriculoatrial (VA) conduction. Ventricular extrastimuli elicited during His\u2010bundle refractoriness resulted in tachycardia termination. During the tachycardia, both the ventricles and the distal right bundle were not part of the reentrant circuit. These findings were consistent with a concealed nodofascicular pathway. RF ablation in the right atrial mid\u2010septal region with the earliest atrial activation preceded by a possible AP potential resulted in tachycardia termination and elimination of VA conduction. In case 2, antidromic reciprocating tachycardia of a right bundle branch block pattern was considered to involve an anterograde left posteroseptal atriofascicular pathway. For this pathway, decremental conduction properties as typically observed for right atriofascicular pathways could be demonstrated. During atrial stimulation and tachycardia, a discrete AP potential was recorded at the atrial and ventricular insertion sites and along the AP. Mechanical conduction block of the AP was reproducibly induced at the annular level and at the distal insertion site. Successful RF ablation was performed at the mitral annulus.<\/jats:p><jats:p> <jats:italic>Conclusion:<\/jats:italic> This report describes two unusual cases consistent with concealed nodofascicular and left anterograde atriofascicular pathways, which were ablated successfully without impairing normal AV conduction system.<\/jats:p>","DOI":"10.1111\/j.1540-8167.2000.tb00323.x","type":"journal-article","created":{"date-parts":[[2007,4,20]],"date-time":"2007-04-20T13:26:39Z","timestamp":1177075599000},"page":"211-217","source":"Crossref","is-referenced-by-count":26,"title":["Electrophysiologic Characteristics and Radiofrequency Ablation of Concealed Nodofascicular and Left Anterograde Atriofascicular 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