Research Highlights:

• Pacemakers reconditioned with an FDA-approved protocol worked as well as new devices in a study of nearly 300 people in seven low- and middle-income countries.
• The study compared the function and safety of reconditioned pacemakers to new devices at 90 days.
• More research is needed to determine the long-term safety and effectiveness of reconditioned pacemakers; however, this trial suggests positive outcomes for heart patients with lower financial resources who need pacemakers.
• Note: The study featured in this news release is a research abstract. Abstracts presented at American Heart Association’s scientific meetings are not peer-reviewed, and the findings are considered preliminary until published as full manuscripts in a peer-reviewed scientific journal.

Embargoed until 4:15 p.m. CT/5:15 p.m. CT, Sunday, Nov. 17, 2024

(NewMediaWire) - November 17, 2024 - CHICAGO — A randomized trial that compared previously used and new pacemakers in patients found the reconditioned devices were as safe and effective as new pacemakers, potentially offering affordable options for patients in low-and middle-income countries. This was the finding of late-breaking science presented today at the American Heart Association’s Scientific Sessions 2024. The meeting, Nov. 16-18, 2024, in Chicago, is a premier global exchange of the latest scientific advancements, research and evidence-based clinical practice updates in cardiovascular science.

Reusing pacemakers is prohibited in the U.S. However, the U.S. Food & Drug Administration allows re-sterilized devices to be exported for reuse. Pacemakers were recovered from deceased patients and patients undergoing surgeries that required the removal of their existing devices. Pacemakers with at least six years of battery life and proper electrical function were sterilized for reuse.

The “My Heart Your Heart” (MHYH) study compared the function of refurbished pacemakers to new devices in a randomized trial of nearly 300 adults in seven countries.

“Access to pacemakers is limited in many low- and middle-income countries due to the relatively high cost of the devices,” explained lead study author Thomas Crawford, M.D., a professor of internal medicine in the division of cardiovascular disease at the University of Michigan Medical School in Ann Arbor, Michigan. “In some high-income countries, as many as 1,000 people per million population may receive a pacemaker annually. In low-income countries, it could be 3 per million population or fewer who get pacemakers each year.”

Previous research has suggested that refurbished pacemakers could be safely implanted. However, those studies were retrospective, noting trends from previously collected information. This is the first prospective, randomized study that included patient outcomes related to function and infection with reconditioned devices, with follow-up information collected up to 90 days after implantation.

“With reconditioned pacemakers, there is worry about whether the device will cause infection and whether it will function properly,” Crawford said. “The 90-day endpoint of the My Heart Your Heart study addresses the most immediate concern of infection because most of the infections related to the implantation procedure occur within that period.”

The trial assessed outcomes in patients evaluated in the hospital at two weeks after pacemakers were implanted and for up to 90 days afterward.

The analysis found:

• Five cases of infection at the implant site (device pocket infections) required implant removal: three of which were among the patients who had received new devices and two patients in the group that had received reconditioned pacemakers.
• A superficial skin infection responsive to antibiotics occurred in one patient with a new device. This device did not have to be removed, and the infection cleared.
• Five patients with new pacemakers required surgery to move or replace the device’s leads after pacemaker implantation, compared to six patients with reconditioned devices. Lead dislodgement is a known complication of a standard pacemaker implantation procedure.
• No device malfunctions were reported among any patients.
• Three deaths unrelated to the device implantation occurred in the reconditioned group and none in the new pacemaker group.

The researchers concluded that reconditioned pacemakers were comparable to new pacemakers in terms of safety and effectiveness up to 90 days after implantation; however, longer-term follow-up is necessary.

“Our study shows pacemaker recycling is green, good for the environment and can save the lives of people in other countries who can’t afford a new device,” Crawford said. “However, longer-term follow-up will be necessary to confirm the safety and efficacy of reconditioned devices, including whether they continue to work as expected and whether the batteries depreciate at the expected rate.”

A major limitation of the study is the short follow-up period of up to 90 days. Longer follow-up may reveal problems with reconditioned devices occurring later, especially premature battery depletion or late device malfunction, Crawford said. In addition, the study included a small number of patients.

Study details, background and design:

• The study group included 298 adults who were candidates for pacemakers and had no financial means to acquire a new device; 149 were randomly assigned to new pacemakers and 149 to reconditioned devices.
• Funding was provided by donations to MHYH, which allowed interested sites with government approval to purchase new and reconditioned pacemakers locally. Both hospital and physician resources were provided for free.
• Device safety and effectiveness were assessed for each patient in-hospital at two weeks and then for up to 90 days in office visits. A total of 280 patients completed at least one follow-up visit.
• Among participants receiving a new device, 48% were men, and their average age was 70 years. Among those who received reconditioned pacemakers, 51% were men and their average age was 72 years.
• Trial participants had a variety of heart rhythm disorders including sick sinus syndrome.
• The MHYH study was conducted in Sierra Leone, Venezuela, Nigeria, Kenya, Paraguay, Mexico and Mozambique from May 2022 to June 2024.

Co-authors, disclosures and funding sources are listed in the abstract.

Statements and conclusions of studies that are presented at the American Heart Association’s scientific meetings are solely those of the study authors and do not necessarily reflect the Association’s policy or position. The Association makes no representation or guarantee as to their accuracy or reliability. Abstracts presented at the Association’s scientific meetings are not peer-reviewed, rather, they are curated by independent review panels and are considered based on the potential to add to the diversity of scientific issues and views discussed at the meeting. The findings are considered preliminary until published as a full manuscript in a peer-reviewed scientific journal.

The Association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific Association programs and events. The Association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and biotech companies, device manufacturers and health insurance providers and the Association’s overall financial information are available here.

Additional Resources:

• Multimedia is available on the right column of the release link.
• Link to abstract; and AHA Scientific Sessions 2024 Online Program Planner
• AHA health information: Animation of a pacemaker
• AHA Scientific Statement: Update on Cardiovascular Implantable Electronic Device Infections and Their Prevention, Diagnosis, and Management (Dec. 2023)
• For more news at AHA Scientific Sessions 2024, follow us on X @HeartNews, #AHA24

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About the American Heart Association

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