title: [A new electrocardiographic algorithm for localizing accessory pathways using only the polarity of the QRS complex].
abstract: From 250 consecutive patients who underwent radiofrequency ablation of accessory pathways, we studied 102 patients with successful ablation of a single overt accessory pathway. All patients had manifested preexcitation on a baseline 12 lead electrocardiogram. None of this patients had additional congenital or acquired cardiac abnormalities which could have affected the QRS morphology. A new algorithm for localizing the AP site was developed, based only on the polarity of the QRS complexes in DIII, V1 and V2, without analysis of the delta wave. We could localize the accessory pathway in five sites with 88% of probability of success. This simplify the electrocardiographic analysis of Wolff Parkinson White and improvement the results of radiofrequency ablation.
authors.affiliation: Departamento de Electrofisiología, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.
authors.forename: P
authors.initials: P
authors.lastname: Iturralde Torres
authors.forename: V
authors.initials: V
authors.lastname: Araya Gómez
authors.forename: A
authors.initials: A
authors.lastname: de Micheli
authors.forename: L
authors.initials: L
authors.lastname: Colín Lizalde
authors.forename: S
authors.initials: S
authors.lastname: Kershenovich
authors.forename: J M
authors.initials: JM
authors.lastname: Casanova Garcés
authors.forename: J A
authors.initials: JA
authors.lastname: González-Hermosillo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000465:Algorithms; D001499:Bayes Theorem; D017115:Catheter Ablation / Q000295:instrumentation / Q000379:methods; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography / Q000379:methods* / Q000706:statistics & numerical data; D004594:Electrophysiology; D005260:Female; D006329:Heart Conduction System / Q000002:abnormalities* / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012680:Sensitivity and Specificity; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery
vernacular_title: Un nuevo algoritmo electrocardiográfico para la localización de las vías accesorias utilizando únicamente la polaridad del complejo QRS.