title: [Prognostic factors for success in catheter ablation of the right Kent bundle: report of 27 patients].
abstract: In 27 patients with atrial fibrillation and/or reciprocating tachycardia, ablation of right-sided Kent bundles (23 in the right posterior paraseptal region and four of the right free wall) was performed. The anterograde refractory period of the accessory pathways was 253 +/- 70 msec and the shortest R-R interval during atrial fibrillation 211 +/- 47 msec. Cumulative energies of 589 +/- 396 J per patient were used, with 3 +/- 2 shocks and 195 +/- 312 J per shock. Accessory pathway ablation was effective in 16/27 patients (59%) during an 11 +/- 8 months of follow-up (in 15/16 pre-excitation disappeared; in nine of them the anterograde and retrograde conductions were abolished and in the other six the anterograde and retrograde conductions were severely altered; ablation was partially ineffective in 1/16 patients who remained asymptomatic on medical treatment and without inducible reciprocal rhythm). Ablation was ineffective in 11/27 patients. Three hours after ablation a patient died from electromechanical dissociation; during ablation a 200 J shock cancelled preexcitation, not being possible to produce reciprocal rhythm. The emergency echocardiography only showed a minimum posterior pericardial effusion. Ablation was effective in 15/23 patients (65%) right posterior paraseptal. Overall success in 1989 (10/27 patients) was 70% (7/10 patients). The success in 1989 was 70% (6/8 patients) right posterior paraseptal. The shortest RP' interval (was 82 +/- 19 msec) during the reciprocal rhythm, where the ablation was performed, was 82 +/- 19 msec (74 +/- 17 msec with success and 99 +/- 19 msec with failure).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Servicio de Cardiología, Hospital de Cruces, Baracaldo, Vizcaya.
authors.forename: A
authors.initials: A
authors.lastname: Bodegas
authors.forename: A
authors.initials: A
authors.lastname: Leenhardt
authors.forename: B
authors.initials: B
authors.lastname: Cauchemez
authors.forename: F
authors.initials: F
authors.lastname: Chouty
authors.forename: J F
authors.initials: JF
authors.lastname: Leclercq
authors.forename: P
authors.initials: P
authors.lastname: Coumel
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000601:surgery*; D006328:Cardiac Catheterization; D005260:Female; D006346:Heart Septum / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013610:Tachycardia / Q000601:surgery*
vernacular_title: Factores pronóstico de éxito en la fulguración de los haces de Kent derechos: a propósito de una serie de 27 pacientes.