Device longevity of a leadless pacemaker family

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Device Technology

Background:

• Leadless ventricular pacemakers are available for VVIR and AV synchronous pacing.
• Advancements in battery and electronics have led to next-generation devices.

Purpose of the Study:

• To evaluate the impact of battery and electronics enhancements on the longevity of Micra leadless pacemakers (Micra VR2 and AV2) compared to previous versions (Micra VR and AV).
• To estimate the lifetime device replacement needs for patients using these pacemakers.

Main Methods:

• Utilized real-world pacing data from the Micra IDE study and Medtronic's CareLink database.
• Incorporated historical pacemaker patient survival data from Medtronic's Device Registry.
• Projected device longevity and estimated lifetime replacement proportions.

Main Results:

• Median projected longevity for Micra VR2 (16.7 years) and Micra AV2 (15.6 years) significantly exceeds that of Micra VR (12.3 years) and Micra AV (10.8 years).
• A higher percentage of patients require only one Micra VR2 (91%) or AV2 (80%) device over their lifetime.
• Micra VR2 and AV2 are projected to reduce device replacements by 8 and 15 per 100 patients, respectively, compared to earlier models.

Conclusions:

• Next-generation Micra leadless pacemakers demonstrate substantial improvements in projected device longevity.
• These enhancements increase the likelihood that patients will be managed with a single device throughout their lifetime, reducing the need for replacements.