Case Report (n=1)
This case demonstrates that intra-isthmus reentry can occur in patients with complex congenital heart disease and is amenable to radiofrequency ablation.
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Ablation may be feasible for intra-isthmus reentry in complex CHD; hypothesis-generating and should not yet change practice.
A 62-year-old man with uncorrected cyanotic congenital heart disease involving double inlet left ventricle with visceral and atrial situs solitus, L-looped ventricles, L-transposed great vessels, and pulmonary stenosis, presented with recurrent atrial tachycardia. Entrainment mapping revealed the arrhythmia mechanism to be an uncommon micro-reentrant cavotricuspid isthmus-dependent circuit (intra-isthmus reentry), which was amenable to radiofrequency ablation. This uncommon right atrial arrhythmia is yet to be reported in patients with complex congenital heart disease and was amenable to radiofrequency ablation.
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Dhillon et al. (2012) conducted a case report in Uncorrected cyanotic congenital heart disease with recurrent atrial tachycardia (n=1). Radiofrequency ablation was evaluated.
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