-- Randy Dotinga
WEDNESDAY, Feb. 1 (HealthDay News) -- To open a clogged neck
artery, a surgeon has two options: either insert a metal stent to
keep blood flowing or perform surgery. A new study finds that both
approaches will likely keep the arteries clear for at least two
years and help prevent stroke.
"Unlike bare metal stents placed in coronary [heart] arteries, where re-blockage occurs about 20 percent of the time, we found the re-blockage rates in the carotid artery were quite small," said study lead author Dr. Brajesh K. Lal, associate professor of vascular surgery at the University of Maryland School of Medicine in Baltimore, in a statement provided by the American Stroke Association.
"Patients and physicians can be reassured that both procedures are durable and that re-blockage rates are equivalent, so they can use different criteria to determine which procedure is right for a patient," he added.
The study was funded by the U.S. National Institute of
Neurological Disorders and Stroke, and by stent maker Abbott
Clogs in the carotid arteries -- the two large blood vessels in
the neck -- cause about 10 percent of strokes. The study looked at
about 2,200 patients with a partially blocked neck artery. About
half the patients received a stents in the artery, which is a
minimally invasive procedure, and about half underwent an
Over two years, the researchers found that the arteries narrowed
again in close to 6 percent of both groups of patients. The
arteries became entirely blocked less than 1 percent of the time in
Patients whose arteries narrowed again faced a four-fold
increase in their risk of stroke.
The research into these patients will continue so physicians can
see what happens over a 10-year period.
Dr. Brahmajee K. Nallamothu, an associate professor of internal
medicine at the University of Michigan Health System, who's
familiar with the findings, said the research is valuable.
"First, it supports the durability of carotid stenting over time, and provides additional evidence for this minimally invasive treatment option," he said. "Second, it suggests a link between the recurrence of blockages and future strokes. This is an interesting observation, which has potential implications for how we manage patients who develop recurrent narrowing in their carotid artery."
Nallamothu said patients should almost always get to decide
which strategy they prefer. Carotid stenting is a bit more
expensive than surgery, he noted, and "side effects are the big
issue. Carotid stenting appears to lower the risks of heart attacks
relative to (surgery) around the time of the procedure, while the
reverse is true in regards to the risk of stroke," he added.
The study was scheduled for release Wednesday at the American
Stroke Association conference in New Orleans.
Research presented at meetings should be considered preliminary
until published in a peer-reviewed medical journal.
To learn about carotid artery disease, visit the
U.S. National Institutes of Health.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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