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Cryoablation of Congenital Familial Ectopic Tachycardia with Preservation of Atrioventircular Nodal Function in an Infant

A 1‐year‐old child weighing 8 kg with familial congenital junctional ectopic tachycardia that was difficult to treat with antiarrhythmic medications underwent successful cryoablation with preservation of atrioventricular (AV) nodal function. This report describes a strategy of cryoablation in conjunction with a 3‐D mapping system and the use of atrial overdrive pacing during cryothermal application to assess AV nodal function.