title: Concealed left anterior accessory pathways: two approaches for successful ablation.
abstract: Left anterior accessory pathways are considered to occur rarely because the junction between the aortic and mitral valve areas represents a fibrous continuity. Of 207 patients with concealed left accessory pathways in whom catheter ablation was performed at our institution over the past 8 years, two patients had concealed left anterior accessory pathways. The polarity of the retrograde P waves was positive in the inferior leads and negative in leads I and aVL during orthodromic reciprocating tachycardia. Complete elimination of accessory pathway conduction was achieved using a transseptal approach or with radiofrequency energy application from the left sinus of Valsalva.
authors.affiliation: From the Division of Cardiology, Gunma Prefectural Cardiovascular Center, Maebashi, Gunma, Japan. tada.h@cvc.pref.gunma.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tada
authors.forename: Shigeto
authors.initials: S
authors.lastname: Naito
authors.forename: Koichi
authors.initials: K
authors.lastname: Taniguchi
authors.forename: Akihiko
authors.initials: A
authors.lastname: Nogami
mesh_terms: D000293:Adolescent; D017115:Catheter Ablation / Q000379:methods*; D006329:Heart Conduction System / Q000002:abnormalities* / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000601:surgery*; D016896:Treatment Outcome