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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Greater mortality risk among patients with delayed follow-up after implantable cardioverter defibrillator procedures
Zachary W M Laksman1, Andrew D Krahn2, Paul Dorian3
1Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada.
Insights
Early follow-up after implantable cardioverter defibrillator (ICD) implantation significantly reduces the risk of death. Timely ICD clinic visits improve survival compared to delayed care or primary care follow-up.
Area of Science:
- Cardiology
- Medical Device Technology
- Public Health
Background:
- Implantable cardioverter defibrillators (ICDs) are crucial for preventing sudden cardiac death.
- A significant number of deaths occur among ICD recipients, highlighting the need for optimized post-implantation care.
- Timely follow-up care after ICD implantation may improve patient outcomes and reduce mortality.
Purpose of the Study:
- To investigate the impact of early vs. late defibrillator clinic follow-up on mortality outcomes in ICD recipients.
- To compare the effectiveness of ICD clinic follow-up versus primary care physician follow-up after device implantation.
- To identify factors associated with delayed follow-up care in ICD patients.
Main Methods:
- A retrospective analysis of the Ontario ICD Database (2007-2011) involving 8096 ICD recipients.
- Comparison of patient characteristics and outcomes between early (< 12 weeks) and late (> 12 weeks) ICD clinic follow-up groups.
- Time-varying covariate analyses were used to assess the effect of follow-up timing on mortality.
Main Results:
- Patients with early ICD clinic follow-up had a significantly reduced risk of all-cause mortality (HR 0.69, P=0.023) and out-of-hospital death (HR 0.52, P=0.001).
- Early follow-up did not significantly impact cardiovascular hospitalizations.
- Delayed follow-up was associated with factors including reduced estimated glomerular filtration rate, secondary prevention devices, myocardial ischemia, smoking, and greater geographic distance.
Conclusions:
- Early defibrillator clinic follow-up after ICD implantation is associated with improved survival.
- Prompt post-implantation care is critical for reducing mortality in ICD recipients.
- Further research may explore strategies to ensure timely follow-up for all ICD patients.
Background:
Substantial numbers of deaths occur among implantable cardioverter defibrillator (ICD) recipients. Timely follow-up after ICD implantation might improve patient outcomes. Our objective was to examine follow-up care and outcomes among patients undergoing ICD implantation.
Methods:
We compared patient characteristics and outcomes of those with late (> 12 weeks) vs early defibrillator clinic follow-up after ICD implantation in the Ontario ICD Database from 2007 to 2011. We examined the effect of ICD clinic follow-up visits after implant compared with primary care physician tracer on mortality outcomes using time-varying covariate analyses.
Results:
Among 8096 ICD recipients (age 64.6 ± 12.6 years), 1145 (14%) received delayed follow-up. Patients with early ICD clinic follow-up experienced reduced risk of all-cause mortality, with a hazard ratio [HR] of 0.69 (95% confidence interval [CI], 0.50-0.95; P = 0.023) adjusted for clinical factors, primary care visits after discharge, and distance to follow-up centre. Early ICD clinic follow-up was associated with a reduction in out-of-hospital death with adjusted HR of 0.52 (95% CI, 0.36-0.76; P = 0.001) but not with a significant change in cardiovascular hospitalizations. In a tracer analysis, early primary care physician follow-up was associated with a nonsignificant trend toward increased mortality with an adjusted HR of 1.48 (95% CI, 0.97-2.25; P = 0.072). Reduced estimated glomerular filtration rate, secondary prevention or replacement devices, myocardial ischemia, smoking, and greater geographic distance to the implanting centre increased the odds of delayed follow-up.
Conclusions:
After device implantation, early defibrillator clinic follow-up was associated with reduced risk of all-cause and out-of-hospital death compared with those experiencing delayed follow-up.
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