Shock Reduction Programming and Heart Function Recovery in Japanese Patients Undergoing Implantable Cardioverter...

Area of Science:

• Cardiology
• Medical Devices

Background:

• Implantable cardioverter-defibrillators (ICDs) provide prognostic benefits for patients with reduced left ventricular ejection fraction (LVEF).
• ICD utilization remains low in Japan despite proven benefits.

Purpose of the Study:

• To evaluate the outcomes of primary prevention ICD implantation in Japanese patients.
• To assess the incidence of appropriate shocks and changes in LVEF post-implantation.

Main Methods:

• Analysis of 25 patients undergoing primary prevention ICD implantation.
• Median follow-up of 52.6 months.
• Monitoring for appropriate shocks, non-sustained ventricular tachycardia (NSVT), and LVEF changes.

Main Results:

• No appropriate shocks were recorded during the follow-up period.
• Non-sustained ventricular tachycardia (NSVT) was frequently observed.
• Left ventricular ejection fraction (LVEF) improved to over 35% in approximately half of the patients.

Conclusions:

• Cardiac resynchronization therapy and pharmacotherapy may contribute to improved cardiac function.
• Optimized ICD programming, including avoidance of unnecessary shock delivery, may enhance patient outcomes.