Cryomap failure.

Abstract Background  The use of cryomapping at a temperature of −30� to produce reversible lesions has been reported to improve the safety of accessory pathways ablation performed close to the normal conduction system while maintaining efficacy. Materials and methods  We reviewed all the ablation cases in which cryothermal technology was employed in our institution. Cryoablation and cryomapping temperature settings, number and time of the applications, recorded cardiac electrograms and ablation outcomes were analyzed. Results  In three of nine cases where cryoablation was used for accessory pathway ablation, cryomapping failed to identify the location of the pathway or to prevent AV block. Conclusions  We postulate that currently recommended cryomapping settings are inadequate for all accessory pathways ablation. [ABSTRACT FROM AUTHOR]