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Relation between impedance and electrode temperature during radiofrequency catheter ablation of accessory pathways and atrioventricular nodal reentrant tachycardia.

Abstract：

OBJECTIVES:Impedance monitoring has been proposed as a method to assess the adequacy of tissue heating during catheter ablation procedures. The purpose of this study was to evaluate the relation among initial impedance, fall in impedance, and electrode temperature during catheter ablation procedures. METHODS AND RESULTS:Data from 248 applications of radiofrequency energy in 45 consecutive patients (26 with accessory pathways and 19 with atrioventricular nodal reentrant tachycardia) referred for catheter ablation were analyzed. The initial impedance was higher during ablation of accessory pathways than during atrioventricular nodal reentrant tachycardia (116+/-66 versus 106+/-80 omega, P < .001). In both groups, a significant correlation was observed between the initial impedance and temperature (R = 0.98, P < .001). After accounting for differences between patients and ablation targets, an even closer correlation was observed (accessory pathways: R = 0.95, P < .0001; atrioventricular nodal reentrant tachycardia: R = 0.94, P < .0001). CONCLUSION:These data suggest that monitoring of the initial impedance and the fall in impedance during ablation procedures may provide clinically valuable information to assess the efficacy of tissue heating and lesion formation.

journal_name

Am Heart J

journal_title

American heart journal

authors

Nsah E,Berger R,Rosenthal L,Hui R,Ramza B,Jumrussirikul P,Lawrence JH,Tomaselli G,Kass D,Calkins H

doi

10.1016/s0002-8703(98)70130-9

subject

Has Abstract

pub_date

1998-11-01 00:00:00

pages

844-51

issue

5

eissn

0002-8703

issn

1097-6744

pii

S0002870398000477

journal_volume

136

pub_type

杂志文章

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