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2010•The Chinese Journal of Cardiac Pacing and ElectrophysiologyRequires access

The change of fast path effective refractory period of atrioventricular nodal reentrant tachycardia in cryoablation

LI Zhong-ji

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Abstract

Objective To analysize the change of fast path effective refractory period(FPERP)with atrioventricular nodal reentrant tachycardia(AVNRT)patients in cryoablation.Methods Twenty-six patients with AVNRT before,in and after successful cryoablation were performed electrophysiologic test and recorded the change of FPERP and AH interval.Results All patients were successfully cryoablated at the slow path.The FPERP temporarily prolonged significantly during the cryoablation(386.29±67.65 ms vs 330.29±71.80 ms,P0.05)and recovered after cryoablation(301.14±73.24 ms vs 330.29±71.80 ms,P0.05).While there was no change in AH interval(83.80±12.24 ms vs 77.77±12.52 ms,P0.2).Conclusion The FPERP temporarily extends during cryoablation of the slow path and immediately recovers as ablation stops.

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Objective To analysize the change of fast path effective refractory period(FPERP)with atrioventricular nodal reentrant tachycardia(AVNRT)patients in cryoablation.Methods Twenty-six patients with AVNRT before,in and after successful cryoablation were performed electrophysiologic test and recorded the change of FPERP and AH interval.Results All patients were successfully cryoablated at the slow path.The FPERP temporarily prolonged significantly during the cryoablation(386.29±67.65 ms vs 330.29±71.80 ms,P0.05)and recovered after cryoablation(301.14±73.24 ms vs 330.29±71.80 ms,P0.05).While there was no change in AH interval(83.80±12.24 ms vs 77.77±12.52 ms,P0.2).Conclusion The FPERP temporarily extends during cryoablation of the slow path and immediately recovers as ablation stops.

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Available abstract

Objective To analysize the change of fast path effective refractory period(FPERP)with atrioventricular nodal reentrant tachycardia(AVNRT)patients in cryoablation.Methods Twenty-six patients with AVNRT before,in and after successful cryoablation were performed electrophysiologic test and recorded the change of FPERP and AH interval.Results All patients were successfully cryoablated at the slow path.The FPERP temporarily prolonged significantly during the cryoablation(386.29±67.65 ms vs 330.29±71.80 ms,P0.05)and recovered after cryoablation(301.14±73.24 ms vs 330.29±71.80 ms,P0.05).While there was no change in AH interval(83.80±12.24 ms vs 77.77±12.52 ms,P0.2).Conclusion The FPERP temporarily extends during cryoablation of the slow path and immediately recovers as ablation stops.

Key concepts: Cryoablation, Medicine, Tachycardia, Effective refractory period, Ablation, Refractory (planetary science), NODAL, Refractory period

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