FAILURE OF A 2ND AND 3RD GENERATION IMPLANTABLE CARDIOVERTER DEFIBRILLATOR TO SENSE VENTRICULAR-TACHYCARDIA - IMPLICATIONS FOR FIXED-GAIN SENSING DEVICES

被引:21
作者
SPERRY, RE
ELLENBOGEN, KA
WOOD, MA
STAMBLER, BS
DIMARCO, JP
HAINES, DE
机构
[1] VIRGINIA COMMONWEALTH UNIV,MED COLL VIRGINIA,DIV CARDIOL,BOX 53,MCV STN,RICHMOND,VA 23298
[2] UNIV VIRGINIA,DIV CARDIOL,CHARLOTTESVILLE,VA 22903
来源
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY | 1992年 / 15卷 / 05期
关键词
IMPLANTABLE CARDIOVERTER DEFIBRILLATORS; VENTRICULAR FIBRILLATION; SENSING;
D O I
10.1111/j.1540-8159.1992.tb06841.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Failure to sense ventricular tachycardia and/or ventricular fibrillation by implantable cardioverter defibrillators (ICDs) is rare. We report a case in which persistent undersensing of monomorphic and polymorphic ventricular tachycardia occurred with a second and third generation ICD using fixed-gain sensing. This occurred despite adequate R wave sensing during sinus rhythm. The use of an endocardial sensing lead did not correct the problem. Failure to sense ventricular tachycardia in the third generation device with fixed-gain sensing occurred late after implantation and was discovered only at follow-up electrophysiology testing of the ICD. This problem could not be corrected by reprogramming of the device, and was not related to lead dislodgement. Placement of a new device with an automatic-gain sensing algorithm and use of previously implanted epicardial leads with better sensing characteristics provided appropriate sensing of ventricular tachyarrhythmias. The case illustrates the importance of testing the sensing of all ventricular arrhythmias in patients with fixed-gain ICD's. Follow-up electrophysiology testing and evaluation of epicardial and endocardial leads may be necessary in certain cases to ensure adequate sensing of ventricular tachyarrhythmias late after implantation.
引用
收藏
页码:749 / 755
页数:7
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