Subcutaneous implantable cardioverter-defibrillator: Initial experience.

Area of Science:

• Cardiology
• Medical Devices
• Electrophysiology

Background:

• Implantable cardioverter-defibrillators (ICDs) are crucial for preventing sudden cardiac death.
• Transvenous ICD implantation carries risks, including vascular access complications.
• Subcutaneous ICDs (S-ICDs) present an alternative approach to mitigate these risks.

Purpose of the Study:

• To evaluate the therapeutic outcomes and complication profile of S-ICD systems.
• To assess the feasibility of S-ICD implantation in patients with specific indications.

Main Methods:

• S-ICD implantation was planned for 23 patients with contraindications or high risk associated with transvenous ICDs.
• Patient cohort included diverse cardiac conditions like ischemic heart disease, Brugada syndrome, and cardiomyopathies.
• Implantation success, procedure time, and complication rates were recorded.

Main Results:

• S-ICDs were successfully implanted in 21 of 23 patients, with a mean implantation time of 77 minutes and no immediate complications.
• During a mean 14-month follow-up, 10 patients received S-ICD shocks, appropriate in 50%.
• One infection, one device malfunction requiring replacement, and one non-cardiac death were observed.

Conclusions:

• S-ICD implantation is achievable with high success rates by cardiologists.
• Initial outcomes suggest a favorable safety and efficacy profile for S-ICDs.
• Longer follow-up studies are essential to compare S-ICDs with conventional transvenous devices.