Clinical significance of consecutive shocks in patients with left ventricular dysfunction treated with implantable cardioverter defibrillators

被引:7
|
作者
Endoh, Y [1 ]
Ohnishi, S [1 ]
Kasanuki, H [1 ]
机构
[1] Tokyo Womens Med Univ, Heart Inst Japan, Tokyo, Japan
来源
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY | 1999年 / 22卷 / 01期
关键词
implantable cardioverter defibrillator; consecutive shocks; mortality;
D O I
10.1111/j.1540-8159.1999.tb00330.x
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The purpose of the present study was to determine the clinical significance of consecutive automatic shocks delivered by implantable cardioverter defibrillators (ICDs). Sixty-four patients who received ICDs at our institution between January 1990 and July 1997 were included in this study. There were 53 men and 11 women with a mean age of 50 +/- 14 years. During a follow-up period ranging between 0.2 and 73 months (mean 23 +/- 21 months), 17 patients received consecutive shocks (group A), 29 patients received single shocks (group B), and 18 patients received no ICD therapy (group C). Clinical characteristics, episodes of ICD therapy, and prognosis were compared among the three groups. There were no significant differences among the three groups with regard 50 clinical characteristics, time to first ICD therapy number of antitachycardia pacing episodes, or frequency of inappropriate discharges. The mortality rate tvas higher in group A than in groups B and C (P = 0.0021). The sensitivity of consecutive shocks in predicting death was 70%, the specificity was 88%, and the predictive accuracy was 81% in patients with left ventricular ejection fractions < 35%. In summary consecutive shocks are a clinically important event in patients with ICDs. Specifically, patients who receive consecutive shocks and have a depressed left ventricular function should be considered particularly high risk.
引用
收藏
页码:187 / 191
页数:5
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