Abbott Laboratories has initiated a voluntary recall of its CardioTrack Pro implantable cardiac monitors after identifying a firmware defect that can cause intermittent data transmission failures. The recall affects approximately 28,000 devices implanted in patients across the United States since October 2025.

The firmware issue may result in gaps in continuous heart rhythm monitoring data, potentially delaying the detection of dangerous arrhythmias. Abbott says no adverse patient outcomes have been directly attributed to the defect, but the company is treating the matter with urgency given the life-critical nature of the devices.

Patients with affected devices are being contacted by their physicians to schedule firmware updates, which can be performed wirelessly during a standard office visit without surgical intervention.