{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T07:02:39Z","timestamp":1761807759162},"reference-count":30,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2012,8,16]],"date-time":"2012-08-16T00:00:00Z","timestamp":1345075200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2012,11]]},"abstract":"<jats:p><jats:bold>\n            <jats:italic>Background:<\/jats:italic>\n          <\/jats:bold>\u2002<jats:italic>Radiofrequency catheter ablation (RFCA) for intraatrial reentrant tachycardia (IART) in congenital heart disease (CHD) remains difficult.<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Methods:<\/jats:italic>\n          <\/jats:bold>\u2002<jats:italic>Thirty\u2010four consecutive adult patients (age, 37.6 \u00b1 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\u2010outlet right ventricle (n = 1).<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Results:<\/jats:italic>\n          <\/jats:bold>\u2002<jats:italic>Duration of CHD repair to IART onset was 19.1 \u00b1 8.5 years. Thirty and four patients had single\u2010 and double\u2010loop reentrant tachycardia, respectively. Among the total of 38 IARTs, which were mapped, 22 (57.9%) and 13 (34.2%) IARTs were cavotricuspid isthmus (CTI)\u2010dependent atrial flutter (AFL) and scar\u2010related 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\u2010dependent AFL. CTI\u2010dependent AFL had a significantly longer tachycardia cycle length (TCL) than scar\u2010related AFL (267.6 \u00b1 34.4 ms and 235.9 \u00b1 37.0 ms, respectively; P = 0.031). TCL &gt; 250 ms had 79% sensitivity as the cutoff value for differentiating CTI\u2010dependent from scar\u2010related AFL. The acute success rates of RFCA in CTI\u2010dependent and scar\u2010related AFLs were 85.7% and 90.0%, respectively. The recurrence rates in CTI\u2010dependent and scar\u2010related AFLs were 11.1% and 11.1%, respectively, during a follow\u2010up of 21.2 \u00b1 28.3 months.<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Conclusions:<\/jats:italic>\n          <\/jats:bold>\u2002<jats:italic>CTI\u2010dependent AFL was the most common IART in adult patients with repaired CHD and was easily manageable by RFCA. TCL might help to differentiate CTI\u2010dependent AFL from other IARTs. 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