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

Body Weight Fluctuations Linked to More Deaths in People with Coronary Artery Disease
News | Cardiac Diagnostics| April 25, 2017
Repeated cycles of weight loss and gain may be linked to higher risk for stroke, heart attack and death in people with...
Clinical Study Validates Efficiencies of Stereotaxis Niobe ES System Over Niobe II System
News | Robotic Systems| April 24, 2017
A recent study conducted at Centre Hospitalier Universitaire (CHU) of Saint-Étienne, France validated the advantages of...
CSI recall for saline pump on its atherectomy system
News | Atherectomy Devices| April 19, 2017
Cardiovascular Systems Inc. (CSI) announced April 18 it had initiated a voluntary recall of its 7-10014 Saline Infusion...
USC Study Finds Potassium-Rich Diet Can Lower Blood Pressure
News | Hypertension| April 19, 2017
Eating potassium-rich foods like sweet potatoes, avocados, spinach, beans, bananas and even coffee could be key to...
3-D-printed Model of Stenotic Intracranial Artery Enables Vessel-Wall MRI Standardization
News | 3-D Printing| April 18, 2017
A collaboration between stroke neurologists at the Medical University of South Carolina (MUSC) and bioengineers at the...
Louisiana Medical Center Installs First U.S. Toshiba Medical Infinix-i Sky +
News | Angiography| April 18, 2017
April 18, 2017 — Patients at Terrebonne General Medical Center (TGMC) in Houma, La., now have access to safe, high-qu
3-D Printed Patch Can Help Mend a ‘Broken’ Heart

This photo shows the 3D-bioprinted cell patch in comparison to a mouse heart. When the patch was placed on a live mouse following a simulated heart attack, the researchers saw significant increase in functional capacity after just four weeks. Image courtesy of Patrick O’Leary, University of Minnesota.

News | Stem Cell Therapies| April 18, 2017
April 18, 2017 — A team of biomedical engineering researchers, led by the University of Minnesota, has created a revo
University of California Study Searches for Consistent CT Dose Best Practices
News | Radiation Dose Management| April 17, 2017
A new study led by UC San Francisco has found that radiation doses can be safely and effectively reduced – and more...
Study Finds Significant Variability in Doctors Angioplasty Death Rates
News | Cath Lab| April 17, 2017
Some doctors have higher or lower than expected death rates from coronary angioplasty procedures, also known as...
Overlay Init