What question did this study set out to answer?

To report a rare case of sudden battery failure in a Micra VR pacemaker and its implications for monitoring.

January 10, 2026Pacing and Clinical Electrophysiology0 citationsOpen Access

Sudden Micra VR Battery Failure With Telemetry Loss and Fluoroscopic Battery Deformation

YNYuya NakamuraShowa University YAYumi AiyamaShowa University Hospital KMKanji MikiShowa University Hospital

Key Result

A 68-year-old man experienced sudden battery failure of the Micra VR pacemaker after 4 years, evidenced by telemetry loss and battery deformation.

Key Points

To report a rare case of sudden battery failure in a Micra VR pacemaker and its implications for monitoring.
Implanted Micra VR pacemaker in a patient with persistent atrial fibrillation.
Monitored device performance and performed fluoroscopy after unexpected telemetry loss.
Implanted a Micra AV2 pacemaker based on the observed thresholds and access site.
Pacing ceased abruptly despite projected device longevity.
Fluoroscopy indicated battery expansion without positional changes.
New pacemaker placement improved septal thresholds after access site adjustment.

Structured PICO

Population

1 68-year-old man with persistent atrial fibrillation and complete atrioventricular block

Intervention

Leadless pacemaker (Micra VR)

Outcome

Device failure (sudden battery failure with telemetry loss and fluoroscopic battery deformation)safety

Demonstrates that sudden battery failure in leadless pacemakers can occur and may be diagnosed via fluoroscopic evidence of battery deformation, emphasizing the need for ongoing monitoring.

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

ABSTRACT Leadless pacemakers rarely exhibit intrinsic device failure. A Micra VR was implanted in a 68‐year‐old man with persistent atrial fibrillation and complete atrioventricular block. Four years later, despite a projected 7‐year longevity, pacing abruptly ceased and telemetry was lost. Fluoroscopy showed stable position but new battery‐pack expansion, consistent with an abrupt battery event. A Micra AV2 was implanted; high mid‐to‐lower septal thresholds improved after switching to right internal jugular access for higher septal placement. The malfunctioning Micra VR was percutaneously retrieved. This case illustrates sudden Micra VR battery failure and underscores the value of fluoroscopy, follow‐up, and remote monitoring.

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