TIME TO 1ST PULSE AFTER AUTOMATIC IMPLANTABLE CARDIOVERTER DEFIBRILLATOR IMPLANTATION

被引:13
作者
CURTIS, JJ [1 ]
WALLS, JT [1 ]
BOLEY, TM [1 ]
STEPHENSON, HE [1 ]
SCHMALTZ, RA [1 ]
NAWARAWONG, W [1 ]
FLAKER, GC [1 ]
机构
[1] UNIV MISSOURI,DIV CARDIOL,COLUMBIA,MO 65212
关键词
D O I
10.1016/0003-4975(92)90371-A
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Should automatic implantable cardioverter defibrillator (AICD) power sources be explanted and discontinued if they have not pulsed during the first generator life? We have followed 59 patients an average of 23 months (range, 3 days to 8.4 years) after AICD implantation. The indication for AICD implantation was based on clinical dysrhythmia, history of sudden death, and findings at electrophysiologic study. Thirty-eight of 59 patients (64%) had experienced sudden death and 52/58 (90%) were inducible at electrophysiologic study. Excluding 5 inappropriate pulsing episodes, 31 of 59 patients (53%) had 235 pulses (range, 1 to 36; median, 2 pulses). The time to first pulse after implantation ranged from 1 day to 3.5 years with a median time of 2 months. In 6 patients, the first pulsing occurred later than 1 year after AICD implantation. Fifteen generators demonstrating impending power source failure have been replaced in 11 patients. Power source depletion occurred at an average of 24.1 months (range, 8 to 40 months). In 3 patients, the first pulsing occurred after generator depletion and replacement. By univariate analysis, none of 13 variables (sex, age, cardiac disease process, functional class, previous myocardial infarction, sudden death history, ejection fraction, type of dysrhythmia, inducibility with electrophysiologic testing, number of extra stimuli required for induction, left ventricular aneurysm resection, endocardial resection, or concomitant operation) was found to be a predictor of pulsing (p > 0.05). We conclude that the majority of patients with pulses after AICD implantation will have them during the first 6 months. However, in this group of patients at high risk for sudden death by ventricular dysrhythmia, absence of pulsing during the first battery life does not justify explantation and discontinuance of AICD back-up.
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页码:984 / 987
页数:4
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