Successful Catheter Cryoablation of Hisian Ectopy Using 2 New Diagnostic Criteria Based on Unipolar and Bipolar Recordings of the His Electrogram

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We describe the case of a 61-year-old woman who underwent successful catheter cryoablation of a symptomatic Hisian ectopy. Diagnosis was based on features of the HV interval assessed from a bipolar recording during mapping. The location of the arrhythmic focus was identified using simultaneous unipolar and bipolar recordings of the His electrogram. This case report highlights the use of 2 new criteria for the diagnosis and mapping of Hisian ectopy, and the successful use of cryothermia for the ablation of extrasystoles arising from the His bundle. (J Cardiovasc Electrophysiol, Vol. 23 p. 325-329, March 2012.)

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