Catheter ablation of sinoatrial re-entry tachycardia in a 2 month old infant

Successful catheter ablation of sinoatrial re-entry tachycar-dia in an infant has not been previously reported. This pro-cedure is described in a 2 month old boy with tachycardia induced cardiomyopathy. Sinoatrial re-entry tachycardia (SART) has been estimatedto account for anywhere between 2–17 % of all arrrhyth-mias1 2; nonetheless, the literature on ablation is limited to small numbers of cases3–6 and only two series of more than five patients.7 8 SART is characterised by paroxysmal tachycar-dia with a P wave morphology identical to sinus rhythm, induction, and termination with atrial extrastimuli, and an atrial activation sequence from cranial to caudal as in normal sinus rhythm.9 This electrocardiographic similarity to sinus rhythm may be a cause of underdiagnosis. In the ablation cases reported to date, the youngest patient was 15 years of age.8 Most, however, were significantly older. We describe suc-cessful ablation of SART in a 2 month old infant wh