New Carotid Artery Procedure Lowers Stroke Risk

The carotid arteries are vital blood vessels in the neckthat supply blood to the brain. With stenosis (narrowing) from fatty deposits,or plaque, a person with carotid artery disease has a higher risk of stroke andother complications.

The newest procedure to safely place a stent in a narrowed carotid artery — to lower the risk of stroke — is now being performed at Miami Cardiac & Vascular Institute, part of Baptist Health South Florida.

It’s called TCAR, which stands for “transcarotid artery revascularization.” This innovative system does something remarkable that helps high-risk patients. It actually reverses blood flow temporarily away from the brain. This “flow reversal” — as surgeons call it — protects the patient against plaque that may come loose and flow into the brain, which could cause a stroke.

Two patients — a 71-year-old woman with diabetes and a68-year-old man with emphysema — successfully underwent TCAR last month atMiami Cardiac and Vascular Institute – SouthMiami Hospital.  One of thefirst two patients undergoing TCAR had the blood-reversal system in place for14 minutes; the other for 8 minutes.

The TCAR team was led by vascular surgeons Juan Carlos Pereda, M.D., Libby Watch, M.D., and Steven Kang, M.D., all with Miami Cardiac & Vascular Institute.

“What’s remarkable about TCAR is that patients toleratethis flow reversal extremely well,” says Dr. Pereda. “This procedurehas the lowest amount of ‘hits’ to the brain of any of the other procedures,including traditional carotid artery surgery.”

TCAR is performed through a small incision at the neckline,just above the clavicle — instead of the more common stent placement that isinitiated through the groin. TCAR eliminates the need to navigate cathetersthrough the heart’s aortic arch, which creates a higher risk of stroke duringcarotid stenting through the groin.

“This is an important addition to services and patients of Miami Cardiac and Vascular Institute, as it provides a new and important tool in our approach to reducing stroke risk,” said Barry T. Katzen, M.D., founder and chief medical executive of Miami Cardiac & Vascular Institute.

During flow reversal, the patient’s blood flows away fromthe brain and through the NPS (neuro-protection system), and any material iscaptured in a filter outside of the body.

“During carotid stenting, you have to manipulate thelesion (damaged section of the carotid artery) before you actually deployprotection with a stent,” explains Dr. Pereda. “In the TCARprocedure, we create blood flow reversal and maximize protection because anyplaque that breaks off is not going to the brain — it’s getting sucked downinto the filter within the NPS. You may see bits and pieces of plaque that arebroken off during the procedure (in the NPS).”

Stroke is a potential complication of both traditionalsurgery — known as carotid endarterectomy, or CEA, and the most commonstenting procedure through the groin – both to treat carotid artery disease.Dr. Pereda says that TCAR may represent up to half of procedures performed totreat carotid artery disease in the near future.

“I would characterize TCAR as a hybrid,” says Dr.Pereda. “It’s not the most minimally invasive because it’s not the type ofsmall cut done in the groin. But it’s still minimally invasive because we’renot opening up the lesion itself (as in traditional surgery). TCAR onlyrequires a small incision in the neck.”