Why Early Replacement May Be Necessary for Some Boston Scientific Pacemakers

Why Early Replacement May Be Necessary for Some Boston Scientific Pacemakers

Patients who rely on Boston Scientific pacemakers for lifesaving cardiac rhythm management may now be facing serious questions about their safety. A recently announced recall affects tens of thousands of devices in the Accolade family, raising urgent concerns about the risk of premature battery failure. If a pacemaker enters what’s known as “Safety Mode,” its ability to deliver consistent pacing may be compromised-putting patients at risk of fainting, bradycardia, and in some tragic cases, even death.

The U.S. Food and Drug Administration (FDA) has classified this as a Class I recall-the most serious type-due to the potential for serious injury or death. Many of the devices affected were manufactured before September 2018 and may contain battery components prone to high internal impedance. This condition can cause the pacemaker to enter Safety Mode without warning, especially during higher-power operations like telemetry or memory checks.

If you or a loved one has one of these recalled devices, understanding the reasons behind early replacement and what signs to look for could be crucial. Our lawyers at Alonso Krangle, LLP are ready to help patients who have suffered harm or are facing the anxiety of surgical replacement.

Understanding the Safety Mode Triggered by Battery Defects

At the heart of this recall is the discovery of high battery impedance in certain pacemakers, a defect linked to the battery’s internal structure. According to Boston Scientific and the FDA, a specific group of devices manufactured prior to late 2018 used cathodes processed in a way that increased lithium salt concentrations. This creates a barrier within the battery, interfering with energy delivery to the pacemaker’s circuitry.

When the battery cannot maintain adequate voltage during routine operations, the device may attempt system resets. If it resets three times in a 48-hour window, it enters Safety Mode-a backup mode with non-programmable settings. While this mode is intended to maintain basic life support pacing, it lacks the tailored responsiveness needed for individual cardiac conditions.

In Safety Mode, pacemakers revert to a default setting: unipolar pacing at a fixed rate of 72.5 bpm. This may not be appropriate for patients needing synchronized atrial and ventricular pacing or those sensitive to muscle stimulation caused by unipolar settings. Boston Scientific’s own advisory warns that this could lead to serious health consequences, including pacing inhibition or loss of consciousness.

Which Pacemakers Are Affected and Why This Isn’t a Minor Risk

The pacemaker recall due to battery issue involves multiple device families under the Boston Scientific brand: Accolade, Proponent, Essentio, and Altrua 2 pacemakers, as well as Visionist and Valitude CRT-P devices. The affected units share a manufacturing history that includes the same battery cathode processing technique now linked to higher-than-expected internal resistance and eventual Safety Mode activation.

This is not a hypothetical concern. By December 2024, there had been 832 reports of injuries associated with these devices, and tragically, two confirmed deaths occurred in pacemaker-dependent patients whose devices entered Safety Mode outside a clinical setting. Remote telemetry-once a safeguard-can now inadvertently trigger the very condition that forces device failure, since telemetry itself is a high-power operation.

According to Boston Scientific’s December 2024 physician letter, the advisory population constitutes about 13% of all Accolade-family devices manufactured before September 2018. While not every device will fail, the risk is disproportionately higher in this subpopulation, prompting strong recommendations for early replacement in high-risk patients. This issue is ongoing, and further FDA evaluations are underway.

Full serial number ranges and GTINs are available on the FDA’s website and through Boston Scientific’s Device Lookup Tool.

How the FDA and Boston Scientific Are Responding

The FDA Boston Scientific recall was officially initiated in December 2024, with classification finalized in early 2025 as a Class I recall. The agency’s Safety Communication emphasized that Safety Mode can only be detected through remote monitoring or in-office evaluations, meaning patients may have no warning until symptoms appear or a red alert is triggered by the Boston Scientific LATITUDE™ system.

Boston Scientific has committed to several mitigation efforts, including development of a software update to detect high battery impedance before Safety Mode is triggered. This would allow physicians to proactively replace at-risk devices. However, that update is not yet available. In the meantime, the company recommends regular monitoring and early replacement for patients deemed at risk from non-programmable Safety Mode pacing.

The manufacturer has also updated its cathode processing techniques to reduce the concentration of lithium salts and improve future battery performance. However, that doesn’t help patients currently living with older devices built before September 2018. For them, careful follow-up and shared decision-making with their healthcare providers remain critical.

When Early Replacement Is Considered Necessary

The recommendation for early device replacement risks is not issued lightly. Most medical device recalls favor monitoring over immediate surgical intervention. But here, the known risks of Safety Mode-including loss of synchronization, muscle stimulation, and possible loss of pacing-outweigh the risks of elective pacemaker replacement in many patients.

Boston Scientific advises non-urgent replacement when devices from the advisory population have four years or less of battery longevity remaining. For pacemaker-dependent individuals or those at elevated risk from Safety Mode’s non-programmable pacing settings, replacement should be scheduled proactively rather than reactively. This is particularly important because the device may not sustain full functionality for a standard three-month replacement window once it enters Safety Mode.

Consider an example: A patient with a CRT-P device experiencing early signs of heart failure may suffer rapid decompensation if the device switches to Safety Mode and loses its ability to provide coordinated biventricular pacing. In such cases, preventive replacement may be life-saving. For others, the emotional toll of knowing their device could fail without warning is another factor in the decision to proceed with surgery.

Device Lookup, Monitoring, and the Role of Shared Decision Making

Boston Scientific has created an online Device Lookup Tool that allows patients and physicians to determine whether a particular pacemaker is part of the advisory group. Because the recall applies only to devices manufactured before September 2018, newer units are unaffected. However, verifying device status is essential for peace of mind and clinical safety.

Remote monitoring remains a critical part of device management. Despite the fact that telemetry itself may trigger Safety Mode in rare cases, remote alerts are often the only early signal that a problem exists. For this reason, neither Boston Scientific nor the FDA recommends discontinuing remote monitoring. In fact, for patients with affected devices, in-office evaluations should occur every 12 months, increasing to every three months once battery longevity is under one year.

Patients should work closely with their doctors to assess whether early replacement is appropriate. Shared decision making is key. While routine prophylactic replacement is not advised for everyone, each patient’s cardiac condition and reliance on precise pacing functionality should guide next steps.

What You Can Do If You or a Loved One Has a Recalled Device

If you’ve received a letter about your pacemaker-or if your physician has confirmed that your device is part of the recall-it’s natural to feel worried. But the next steps are clear. First, ensure that your monitoring setup is active and functional. Contact your cardiologist to schedule your next follow-up, and ask if your remaining battery life is under the four-year threshold that Boston Scientific uses as a replacement benchmark.

Watch for symptoms such as dizziness, fatigue, palpitations, or fainting. These could indicate that your device is not pacing effectively, or worse, has entered Safety Mode. If you receive a red alert from the LATITUDE remote system or an in-office test shows device failure, surgery will likely be scheduled quickly to implant a new device.

Legal Options and How Our Firm Can Help

If you or someone you love has suffered harm due to an Accolade family pacemaker entering Safety Mode-or if you’ve undergone an early replacement and endured the risks and costs of surgery-our attorneys at Alonso Krangle, LLP want to hear from you. These device failures are not mere inconveniences. They can cause real injury, emotional distress, and financial loss.

You may be eligible to pursue a claim against Boston Scientific if your recalled pacemaker caused injury, required emergency surgery, or led to hospitalization. While some patients have experienced minor symptoms, others have suffered profound complications, including heart failure and in rare cases, death. Our lawyers are currently reviewing cases involving the recalled pacemakers and are prepared to help victims pursue compensation.

This is not a situation where patients should bear the burden of a manufacturer’s design or production flaw. The FDA recall confirms the seriousness of this issue, and patients deserve both answers and accountability.

Contact Our Lawyers If You’ve Been Affected by the Boston Scientific Pacemaker Recall

If your pacemaker has been recalled-or if you’ve already experienced symptoms linked to Safety Mode-it’s time to speak with our lawyers. The team at Alonso Krangle, LLP is here to help you navigate the medical and legal steps involved in seeking justice and financial recovery.

You don’t need to figure this out on your own. Let our lawyers assess your device’s recall status, review your health records, and advise you on whether you may be eligible for a legal claim. Call [PHONE] or complete the form on this page to schedule a free consultation.

Thousands of devices remain in patients today that could still enter Safety Mode at any time. If yours is one of them, you deserve to know your rights and your options. Don’t wait-reach out now.