Feature | May 13, 2013

CREST Sub-Study Finds Angioplasty After Carotid Stenting Reduces Risk of Repeat Blockage

Minor adjustments during carotid artery interventions can reduce long-term restenosis at two-year follow-up and may lower risk of stroke complications

May 13, 2013 — For patients who received stents to restore blood flow through the main arteries supplying blood to the brain, inflating a tiny balloon inside the arteries after implantation of the stent reduced restenosis, or repeat blockages, of the treated arteries, making them less likely to reclose. Modifying the order in which carotid stenting and balloon angioplasty is performed could also alter risk of stroke complications, according to the investigators of the Carotid Revascularization Endarterectomy versus Stenting Trial (CREST) sub-study presented at the Society for Cardiovascular Angiography and Interventions (SCAI) 2013 Scientific Sessions. 

CREST is the largest, prospective randomized study that compared angioplasty and stenting of the carotid artery in the neck to surgery (carotid endarderectomy), the standard treatment. Carotid stenting is currently only available as a treatment option for patients who cannot undergo surgery. The objective of this sub-study was to evaluate whether undergoing angioplasty post-carotid stenting increases the risk of complications such as stroke.

“Carotid stenting is the subject of ongoing research because it provides a less invasive treatment option, which is often necessary for patients who are too sick to undergo surgery,” said Mahmoud B. Malas, M.D., lead author of the sub-study and associate professor of surgery at Johns Hopkins University and chief of endovascular surgery at Johns Hopkins Bayview Medical Center in Baltimore. “These results show performing balloon angioplasty after stenting significantly reduced the risk of those same arteries narrowing again, but may also increase, though not significantly, the risk of stroke.”

Of 1,109 patients in CREST who underwent carotid artery stenting, 69 patients underwent balloon deployment before the stent was implanted, 344 underwent balloon deployment after the stent was implanted and 696 patients had balloon angioplasty before and after the stent was implanted.

Researchers found the risk of restenosis was reduced by 64 percent simply by expanding a tiny balloon after the stent was placed in the diseased artery rather than before it was implanted. However, the group that underwent angioplasty after the stent had a larger number of strokes compared to the group who received angioplasty only prior to the stent, but that number was not statistically significant.

Results of the CREST trial also showed historically the lowest incidence of stroke as a complication of stenting and balloon angioplasty, regardless of the order. “We actually had too few complications to make any statistically significant assessment about risk of stroke between the different ballooning methods,” explained Malas.

An estimated 83.6 million adults in the United States, about one in three, currently have some form of cardiovascular disease. An estimated 6.8 Americans are expected to suffer from stroke this year alone, according to 2013 statistics from the American Heart Association.

Balloon angioplasty is a common treatment for atherosclerosis, a hardening or narrowing of major arteries throughout the body. The carotid arteries are the main arteries supplying oxygen- and nutrient-rich blood to the brain directly from the aorta as it ascends from the heart. If these essential arteries become blocked, or stenotic, there is a higher risk of stroke because of small debris breaking off from the diseased artery and traveling to the brain. Angioplasty and stenting is performed by interventional cardiologists and vascular surgeons and involves guiding tiny instruments with medical imaging through a small incision in the groin area through major blood vessels to the affected artery—in this case the carotid arteries in the neck. Once in position, a small mesh coil called a stent is implanted inside the artery.

Malas reports no relevant conflicts of interest.

For more information: www.scai.org

Related Content

Spectranetics Announces FDA Approval of Stellarex Drug-Coated Balloon
Technology | Drug-Eluting Balloons| July 26, 2017
The Spectranetics Corp. announced receipt of U.S. Food and Drug Administration (FDA) pre-market approval (PMA) of the...
First European Patient Enrolled in Intact Vascular's TOBA II BTK Trial
News | Stents Peripheral| July 26, 2017
Intact Vascular Inc. recently announced that its Tack Optimized Balloon Angioplasty II Below the Knee (TOBA II BTK)...
New York Hospital Finds Significant Cost Savings With Toshiba's Aquilion One CT
News | Computed Tomography (CT)| July 25, 2017
July 25, 2017 — In five years, Kaleida Health’s Stroke Care Center (SCC) at the Gates Vascular Institute in Buffalo,
Study Discovers Anticoagulant Drugs Are Being Prescribed Against Safety Advice
News | Antiplatelet and Anticoagulation Therapies| July 25, 2017
July 25, 2017 — A study by researchers at the University of Birmingham has shown that general practitioners (GPs) are
New PET-CT Scan Improves Detection in Rare Cardiac Condition
News | PET-CT| July 25, 2017
Using a new imaging technique that can diagnose cardiac sarcoidosis much more accurately than traditional tests,...
Medtronic Announces First Enrollments in STOP AF First Clinical Trial
News | Ablation Systems| July 24, 2017
Medtronic plc recently announced first enrollments in the STOP AF First clinical trial. The trial will evaluate the...
Hospital Readmissions Analysis Across All Ages, Insurance Types Identifies High-Risk Groups
News | Business| July 20, 2017
July 20, 2017 — Clinician-researchers at Beth Israel Deaconess Medical Center (BIDMC) recently published a first-of-i
3-D Vascular Ultrasound Quantifies Plaque Burden to Estimate Cardiovascular Risk
News | Cardiovascular Ultrasound| July 20, 2017
July 20, 2017 — In a large, first-of-its-kind population, researchers found an experimental technique known as...
More Than 20 Percent of Low-Risk Patients Receive Annual ECG
News | ECG| July 20, 2017
July 20, 2017 — More than one in five Ontario patients receive an ...
Sponsored Content | Videos | CT Angiography (CTA)| July 18, 2017
Matthew Budoff, M.D., FACC, professor of medicine, David Geffen School of Medicine at UCLA, endowed chair of preventi
Overlay Init