New-look pacemaker uses ultrasound to stimulate the heart—no implant required
Engineers with the Massachusetts Institute of Technology (MIT) have developed a noninvasive pacemaker that uses ultrasound to stimulate the heart. The group shared its early experience with the device in Nature Biomedical Engineering, highlighting its compact, wearable design.
“Pacemakers are one of the most important and widely used human implants, and they have saved millions of lives,” Gengxi Lu, the study’s co-corresponding author, said in a statement. “But they are invasive, and they make direct contact with the beating heart. The dream for many years has been noninvasive heart stimulation with ultrasound.”
The team’s device is a small sticker worn on the chest. Tiny transducers on the sticker use ultrasound pulses to stimulate the heart in a way that opens certain ion channels in cardiac cells. Lab experiments have been a success, with the device maintaining healthy contractions in human cardiac cells.
For an ultrasound pacemaker to become a reality, researchers believe they would likely begin the process by giving patient’s a one-time injection that boosts the sensitivity of cardiac cells. Once this injection was done, the patient could then theoretically attach the stamp-sized sticker and start experiencing the benefits of the small device right away.
While it’s still early, the group at MIT is optimistic about this new-look pacemaker’s potential. In fact, they hope to combine this latest approach with previous research into sticker-based medical imaging to deliver a single ultrasound sticker that can simultaneously monitor and regulate a patient’s heart.
“We believe you could one day have stickers on the body that could do long-term imaging deep in the body and also do stimulation for therapeutic effects, in a noninvasive closed-loop way,” Xuanhe Zhao, professor of mechanical engineering and of civil and environmental engineering at MIT, said in the same statement.
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Michael has more than 19 years of experience as a professional writer and editor. He has written at length about cardiology, radiology, artificial intelligence and other key healthcare topics.