THERMAL CATHETER DISRUPTION DURING CLOSED-CHEST RADIOFREQUENCY ABLATION OF THE ATRIOVENTRICULAR-CONDUCTION SYSTEM

被引：7

作者：

FROHNER, KJ ^{[1
]}

PODCZECK, A ^{[1
]}

HIEF, C ^{[1
]}

NURNBERG, M ^{[1
]}

STEINBACH, KK ^{[1
]}

机构：

[1] WILHELMINEN HOSP,LUDWIG BOLTZMANN RES INST,A-1160 VIENNA,AUSTRIA

来源：

PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY | 1990年 / 13卷 / 06期

关键词：

catheter disruption; radiofrequency ablation;

D O I：

10.1111/j.1540-8159.1990.tb02097.x

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Radiofrequency ablation of the atrioventricular conduction system was attempted in a 63‐year‐old man with drug refractory atrial fibrillation. A total of 5 radiofrequency pulses (750 kHz, power setting: 25–50 W. pulse duration: 9–20 sec) were delivered in a unipolar fashion via the distal electrode of a 7 Fr bipolar electrode catheter without induction of permanent AV block. No direct measurements of current (I) and voltage (U) were made. During the fifth pulse catheter disruption occurred at the interface of the shaft and the proximal electrode. Inspection of the catheter shaft revealed carbonized insulation material indicating overheating of the catheter tip. Overheating was presumably due to an impedance rise with unrecognized clot formation on the distal electrode. This led to progressive melting of insulation material during repeated radiofrequency applications and short circuiting of current flow to the proximal ring electrode that resulted in catheter disruption. This case report is the first to describe a serious complication of radiofrequency ablation. The complication might have been prevented by measurements of U and I, reflecting changes in impedance or by measurements of catheter tip temperature (T). It is concluded that measurements of U, I, and/or T are necessary to control the coagulation process thereby reducing the risk of serious complications during transcatheter radiofrequency ablation. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：719 / 723

页数：5

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