Alert on Medtronic Pacemakers Due to Battery Drainage

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FDA has issued a safety alert on certain Medtronic implantable pacemakers or cardiac resynchronization therapy pacemakers (CRT-Ps) about issues that may cause their batteries in to drain more quickly than expected without warning patients or health care providers. The agency says it has received three medical device reports in which an affected Medtronic device had fully drained without warning because of a crack in the device’s capacitor.

 

“If a capacitor in an implanted pacemaker or CRT-P is cracked, it can create an electric short, which can cause a battery to drain earlier than expected,” the alert says. “If the battery is completely drained, the device will no longer deliver pacing therapy. The patients who rely heavily on pacing or who are pacemaker dependent may be most at risk for having an adverse outcome.” Medtronic reported that the events occurred within one year after the patient was implanted with the device, on average within seven months of having it implanted.

 

The alert recommends against removal and replacement of affected devices. Instead, patients and health professionals should monitor battery status using home monitoring systems. “Due to the low frequency of device failure, the FDA believes these are appropriate mitigations for most patients, as patients could be at greater risk of complications from the surgical procedure required to replace the device,” it says. Additionally, Medtronic recently received FDA approval to add a new step in its manufacturing process to better detect capacitor failures in newly manufactured devices, and to use a different capacitor.

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