Half the size of a AAA battery, device requires no surgery, could last 14 years
(COLUMBUS, Ohio) May 2014 – Doctors at The Ohio State University Wexner Medical Center are among the first in the country to implant a tiny, high-tech pacemaker directly into the heart of patients, and to do so without surgery. Only 24 millimeters in length, the pacemaker is fed through an artery in a patient’s leg and, using tiny prongs, is attached into place on the heart.
“These devices are 90 percent smaller than current pacemakers and don’t require wires or leads to be fed through the patient’s chest in order to work,” said Dr. John Hummel, an Ohio State cardiologist who is among those leading the investigation into the effectiveness of the new generation of pacemakers.
“Getting rid of the leads cuts down on complications considerably,” said Ohio State’s Dr. Ralph Augostini. “I think this is the biggest advancement in pacing technology in nearly 15 years."
Once in place, the pacemaker constantly monitors the condition of the patient and only activates when necessary. “That allows these devices to be extremely efficient,” Hummel said. “With that kind of intermittent pacing, they could last as long as 14 years.”
To learn more about the pacemaker, click on the video box to the left. For the full press release, “click to read more” below.
WORLD’S SMALLEST, LEADLESS HEART PACEMAKER IMPLANTED AT OHIO STATE
COLUMBUS, Ohio – It’s about the size of a large vitamin pill and, for the first time in Ohio, the smallest heart pacemaker available is being tested at The Ohio State University Wexner Medical Center.
Doctors at Ohio State’s Richard M. Ross Heart Hospital recently implanted the tiny device in a Columbus woman as part of a global clinical trial to test its safety and effectiveness. Unlike conventional pacemakers, which require a chest incision and electrical leads that run through a vein to the heart, this device is wireless and is threaded through a catheter, then attached directly to the heart muscle.
“With this investigational device, the battery, the pacing electrodes, everything is in a little piece of metal sitting inside the heart. We believe that will eliminate a lot of risk for infection and complications,” said Dr. John Hummel, a cardiologist and principal investigator of the trial at Ohio State.
If this transcatheter, leadless pacemaker technology works the way doctors hope, they say it could not only benefit patients, but the minimally invasive approach would be more efficient.
“I think this could be a significant development in pacing procedures. This could cut our procedure time by more than half,” said Dr. Ralph Augostini, a cardiologist at Ohio State.
For now, the tiny pacemaker is being tested in people with bradycardia who need single chamber ventricular pacing. Bradycardia is a slow, irregular heart rhythm which prevents the heart from pumping enough blood into the body. This can cause fatigue, dizziness, shortness of breath and fainting.
A former librarian, 77-year-old Mary Lou Trejo of Columbus, had been suffering from atrial fibrillation for years. Her heart had slowed, despite medication and other treatments to restore rhythm, so she was eager to be among the first in the United States to participate in this clinical trial.
“The new pacemaker sounded so simple, and I have always thought research is important, so I thought this is a way I could contribute,” Trejo said.
The trial will enroll 780 patients in 50 centers worldwide. Investigators are expected to report initial results later this year, once the first 60 patients have been followed for three months.
The Micra Transcatheter Pacing System (TPS) is made by Medtronic, which is funding the clinical trial. Hummel is a consultant for Medtronic. Augostini serves on a Medtronic advisory board.