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Importance of tachycardia cycle length for differentiating typical atrial flutter from scar-related in adult congenital heart disease

Authors
 JAE-SUN UHM ; HEE-SUN MUN ; BOYOUNG JOUNG ; MOON-HYOUNG LEE ; HUI-NAM PAK ; JONG-YOUN KIM ; JUNG-HOON SUNG ; HYE JIN HWANG ; JAEMIN SHIM ; JIN WI 
Citation
 PACE-Pacing and Clinical ElectroPhysiology, Vol.35(11) : 1338~1347, 2012 
Journal Title
 PACE-Pacing and Clinical ElectroPhysiology 
ISSN
 0147-8389 
Issue Date
2012
Abstract
BACKGROUND:  Radiofrequency catheter ablation (RFCA) for intraatrial reentrant tachycardia (IART) in congenital heart disease (CHD) remains difficult. METHODS:  Thirty-four consecutive adult patients (age, 37.6 ± 12.8 years; male, 21) with previously repaired CHD and IART underwent an electrophysiological study and RFCA. CHD included atrial septal defect (ASD, n = 14), tetralogy of Fallot (n = 11), ventricular septal defect (n = 4), pulmonary atresia (n = 2), atrioventricular septal defect (n = 1), transposition of the great arteries (n = 1), and double-outlet right ventricle (n = 1). RESULTS:  Duration of CHD repair to IART onset was 19.1 ± 8.5 years. Thirty and four patients had single- and double-loop reentrant tachycardia, respectively. Among the total of 38 IARTs, which were mapped, 22 (57.9%) and 13 (34.2%) IARTs were cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL) and scar-related AFL, respectively. Typical AFL electrocardiography findings including definite sawtooth appearance in inferior leads and positive F wave in lead V1 were observed in only 12 of 21 patients (57.1%) with CTI-dependent AFL. CTI-dependent AFL had a significantly longer tachycardia cycle length (TCL) than scar-related AFL (267.6 ± 34.4 ms and 235.9 ± 37.0 ms, respectively; P = 0.031). TCL > 250 ms had 79% sensitivity as the cutoff value for differentiating CTI-dependent from scar-related AFL. The acute success rates of RFCA in CTI-dependent and scar-related AFLs were 85.7% and 90.0%, respectively. The recurrence rates in CTI-dependent and scar-related AFLs were 11.1% and 11.1%, respectively, during a follow-up of 21.2 ± 28.3 months. CONCLUSIONS:  CTI-dependent AFL was the most common IART in adult patients with repaired CHD and was easily manageable by RFCA. TCL might help to differentiate CTI-dependent AFL from other IARTs
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/91626
DOI
10.1111/j.1540-8159.2012.03494.x
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
Yonsei Authors
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Link
 http://onlinelibrary.wiley.com/doi/10.1111/j.1540-8159.2012.03494.x/abstract
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