Implantable defibrillators with enhanced detection algorithms: detection performance and safety results from the...

Area of Science:

• Cardiology
• Biomedical Engineering
• Clinical Trials

Background:

• Implantable cardioverter-defibrillators (ICDs) reduce arrhythmia mortality but can cause distress and increased mortality due to shock therapy.
• Protecta ICDs incorporate algorithms to minimize unnecessary shocks.

Purpose of the Study:

• To evaluate the safety and efficacy of the Protecta XT ICD with PainFree SmartShock™ Technology (PainFree SST).
• To determine if novel algorithms affect appropriate ventricular fibrillation (VF) detection.

Main Methods:

• Prospective, multicenter clinical trial (PainFree SST safety study).
• 246 patients implanted with Protecta XT ICD or CRT-ICD.
• Ventricular fibrillation (VF) detection assessed with novel algorithms ON during induced VF.

Main Results:

• No delay in appropriate VF detection was observed with all SmartShock™ algorithms active.
• No serious adverse device effects occurred within the first year post-implantation.
• The study included 246 patients, with 78% males aged 63 years on average.

Conclusions:

• The premarket phase of the PainFree SST trial confirms the safety of Protecta XT defibrillators.
• SmartShock™ algorithms effectively detect VF without delaying life-saving therapy.