Predictors and Clinical Impact of Inappropriate Implantable Cardioverter-Defibrillator Shocks in Korean Patients
Journal of Korean Medical Science
;
: 619-624, 2012.
Article
in English
| WPRIM
| ID: wpr-202338
ABSTRACT
Limited data are available on inappropriate shocks in Korean patients implanted with an implantable cardioverter-defibrillator (ICD). We investigated the impact of inappropriate shocks on clinical outcomes. This retrospective, single-center study included 148 patients treated between October 1999 and June 2011. The primary outcome was a composite event of all-cause mortality or hospitalization for any cardiac reason. The median follow-up duration was 29 months (interquartile range 8 to 53). One or more inappropriate shocks occurred in 34 (23.0%) patients. A history of atrial fibrillation was the only independent predictor of inappropriate shock (hazard ratio [HR] 4.16, 95% confidence interval [CI] 1.89-9.15, P < 0.001). Atrial fibrillation was the most common cause of inappropriate shock (67.7%), followed by supraventricular tachycardia (23.5%), and abnormal sensing (8.8%). A composite event of all-cause mortality or hospitalizations for any cardiac reason during follow-up was not significantly different between patients with or without inappropriate shock (inappropriate shock vs no inappropriate shock 35.3% vs 35.4%, adjusted HR 1.06, 95% CI 0.49-2.29, P = 0.877). Inappropriate shocks do not affect clinical outcomes in patients implanted with an ICD, although the incidence of inappropriate shocks is high.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Atrial Fibrillation
/
Shock
/
Tachycardia, Supraventricular
/
Predictive Value of Tests
/
Retrospective Studies
/
Risk Factors
/
Defibrillators, Implantable
/
Equipment Failure
/
Kaplan-Meier Estimate
/
Republic of Korea
Type of study:
Etiology study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
English
Journal:
Journal of Korean Medical Science
Year:
2012
Type:
Article
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