OVERSENSING FROM ELECTRODE CHATTER IN A BIPOLAR PACING LEAD - A CASE-REPORT

被引:2
作者
CHEW, PH [1 ]
BRINKER, JA [1 ]
机构
[1] JOHNS HOPKINS UNIV HOSP,BALTIMORE,MD 21205
来源
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY | 1990年 / 13卷 / 06期
关键词
active fixation; bipolar pacing; electrode chatter;
D O I
10.1111/j.1540-8159.1990.tb02107.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
An 81‐year‐old man was treated for high degree AV block and syncope with an AV universal (DDD) pacemaker. Bipolar active fixation atrial and ventricular leads were used. Intermittent Oversensing from the ventricular lead was detected on Holter monitoring following implantation. This resulted in inappropriate inhibition of ventricular pacing. Ventricular electrogram showed spurious signals between 5 mV and 15 mV in magnitude coincident with ventricular lead inhibition. Treatment consisted of reprogramming the device to the VVT mode. Six weeks after implantation normal pacemaker function in the DDD mode was demonstrated on Holter monitoring and inappropriate pacer inhibition could not be demonstrated. We postulate that electrode ‘chatter’ between the cathodal ring electrode and the helix of the ventricular lead resulted in artifactual potentials sufficient to inhibit pacing. We hypothesize that fibrosis and fixation of the ventricular lead tip over a period of weeks eliminated these electromechanical artifacts and resulted in the oversensing problem being self‐limited. Physicians should be aware of electrode‘chatter’as a cause of pacemaker oversensing. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码:808 / 811
页数:4
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