Characterization of reentrant circuit in macroreentrant right atrial tachycardia after surgical repair of congenital heart disease: isolated channels between scars allow "focal" ablation.

Autor:	Nakagawa H; Cardiac Arrhythmia Research Institute, University of Oklahoma Health Sciences Center, Oklahoma City, USA. hiroshi-nakagawa@ouhsc.edu, Shah N, Matsudaira K, Overholt E, Chandrasekaran K, Beckman KJ, Spector P, Calame JD, Rao A, Hasdemir C, Otomo K, Wang Z, Lazzara R, Jackman WM
Jazyk:	angličtina
Zdroj:	Circulation [Circulation] 2001 Feb 06; Vol. 103 (5), pp. 699-709.
DOI:	10.1161/01.cir.103.5.699
Abstrakt:	Background: The purpose of this study was to characterize the circuit of macroreentrant right atrial tachycardia (MacroAT) in patients after surgical repair of congenital heart disease (SR-CHD). Methods and Results: Sixteen patients with atrial tachycardia (AT) after SR-CHD were studied (atrial septal defect in 6, tetralogy of Fallot in 4, and Fontan procedure in 6). Electroanatomic right atrial maps were obtained during 15 MacroATs in 13 patients, focal AT in 1 patient, and atrial pacing in 2 patients without stable AT. A large area of low bipolar voltage (Conclusions: MacroAT after SR-CHD requires a large area of low voltage containing >/=2 scars forming narrow channels. Ablation within the channels eliminates MacroAT.
Databáze:	MEDLINE
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