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Updated: Jul 16, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Efficacy of implantable cardioverter-defibrillators for the prevention of sudden death in patients with hypertrophic
B J Maron1, W K Shen, M S Link
1Minneapolis Heart Institute Foundation, MN 55407, USA. gencvres@skypoint.com
Implantable cardioverter-defibrillators effectively prevent sudden death in high-risk hypertrophic cardiomyopathy patients by terminating ventricular arrhythmias. These devices play a crucial role in both primary and secondary prevention strategies for this genetic heart condition.
Area of Science:
- Cardiology
- Genetics
- Medical Devices
Background:
- Hypertrophic cardiomyopathy (HCM) is a genetic disorder.
- HCM increases the risk of sudden cardiac death, particularly in younger individuals.
- Ventricular tachyarrhythmias are a primary concern in HCM patients.
Purpose of the Study:
- To evaluate the efficacy of implantable cardioverter-defibrillators (ICDs).
- To assess ICDs in preventing sudden death in high-risk hypertrophic cardiomyopathy patients.
- To analyze primary and secondary prevention roles of ICDs in HCM.
Main Methods:
- Retrospective multicenter study.
- Involved 128 high-risk hypertrophic cardiomyopathy patients.
- Assessed ICD implantation and activation data.
Main Results:
- Appropriate ICD activation occurred in 23% of patients (7% per year).
- Ventricular tachycardia or fibrillation triggered interventions in all analyzed cases.
- ICDs showed effectiveness in both primary (5% per year) and secondary (11% per year) prevention.
Conclusions:
- Ventricular tachycardia/fibrillation is the main cause of sudden death in HCM.
- ICDs are highly effective in terminating these arrhythmias in high-risk HCM patients.
- ICDs are valuable for primary and secondary prevention of sudden death in HCM.
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