Impedance Monitoring During Radiofrequency Catheter Ablation in Humans

MARK HARVEY, YOON‐NYUN ‐N KIM, JOÃO SOUSA, RAFEL EL‐ATASSI, FRED MORADY, HUGH CALKINS, JONATHAN J. LANGBERG

Research output: Contribution to journalArticlepeer-review

Abstract

Radiofrequency catheter ablation of accessory pathways and the atrioventricular junction often requires multiple applications of energy. The inability to determine the effects of any given application on the underlying tissue may contribute to this problem. In the present study, impedance was monitored in 20 patients undergoing radio/requency catheter ablation, and the relationship between an initial decrease in impedance and subsequent effects were examined. An initial fall in impedance of more than 10 Ω was 78% sensitive and 88% specific for predicting subsequent evidence of tissue heating (interruption of conduction or an abrupt rise in impedance due to coagulum formation). In contrast, initial values of voltage, current, or impedance did not distinguish between effective and ineffective applications of radiofrequency energy. Continuous monitoring of impedance may facilitate radiofrequency catheter ablation.

Original languageEnglish (US)
Pages (from-to)22-27
Number of pages6
JournalPacing and Clinical Electrophysiology
Volume15
Issue number1
DOIs
StatePublished - Jan 1992
Externally publishedYes

Keywords

  • accessory pathways
  • impedance
  • radiofrequency catheter ablation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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