Featured Research

from universities, journals, and other organizations

Better diagnostics could reduce risky surgery for asymptomatic carotid stenosis

Date:
August 17, 2011
Source:
University of Western Ontario
Summary:
New research has shown that using 3-D ultrasound to identify ulcers in the carotid arteries is an effective way to pinpoint the small number of high-risk patients with asymptomatic carotid stenosis (ACS) who would benefit from surgery to prevent stroke. ACS is a blocking or narrowing of the carotid artery in the neck from which there have been no symptoms.

New research from neurologist Dr. David Spence of The University of Western Ontario has shown that using 3-D ultrasound to identify ulcers in the carotid arteries is an effective way to pinpoint the small number of high-risk patients with asymptomatic carotid stenosis (ACS) who would benefit from surgery to prevent stroke. ACS is a blocking or narrowing of the carotid artery in the neck from which there have been no symptoms such as transient ischemic attacks (TIAs).

The research is published in the Aug. 17 online issue of Neurology, the medical journal of the American Academy of Neurology.

In the three-year study of ACS patients, Dr. Spence found that if three or more ulcers were found in the carotid arteries using 3D ultrasound, the patient was at high risk of stroke and could benefit from intervention. He compared it to the proven transcranial Doppler which detects pieces of plaque called microemboli breaking off and entering the blood stream, and found both identified those ACS patients most at risk of having a stroke.

Surgical interventions such as stenting where a stent is threaded from an artery in the groin up to the narrowed carotid artery and then deployed, and carotid endarterectomy, where the blocked artery is opened and the plaque cleaned out, both carry their own risks and costs. Dr. Spence showed in earlier studies (2005) that 90 per cent of patients with ACS were better off being treated with medical therapy. With more intensive medical therapy, the proportion who could benefit from intervention had declined by 2010 to less than five per cent.

"Now we've developed two ways to identify the few who could benefit from surgery or stenting," says Dr. Spence, a Professor in the Department of Clinical Neurological Sciences at Western's Schulich School of Medicine & Dentistry and a scientist in its Robarts Research Institute. "The reason it's important is that in the United States 90 to 95 per cent of carotid endarterectomy and stenting are being done for asymptomatic carotid stenosis even though it's not warranted for the vast majority of them. I hope this study would influence those decisions."

The study was funded by the Heart and Stroke Foundation of Canada. "Thanks to this effort, we are that much closer to providing ways to improve system care for stroke patients," says Manuel Arango, Director, Health Policy, Heart and Stroke Foundation of Canada.

Dr. Spence is also the Director of the Stroke Prevention & Atherosclerosis Research Centre (SPARC) at University Hospital, London Health Sciences Centre.


Story Source:

The above story is based on materials provided by University of Western Ontario. Note: Materials may be edited for content and length.


Journal Reference:

  1. A. Madani, V. Beletsky, A. Tamayo, C. Munoz, J.D. Spence. High-risk asymptomatic carotid stenosis: Ulceration on 3D ultrasound vs TCD microemboli. Neurology, 2011; DOI: 10.1212/WNL.0b013e31822b0090

Cite This Page:

University of Western Ontario. "Better diagnostics could reduce risky surgery for asymptomatic carotid stenosis." ScienceDaily. ScienceDaily, 17 August 2011. <www.sciencedaily.com/releases/2011/08/110817175909.htm>.
University of Western Ontario. (2011, August 17). Better diagnostics could reduce risky surgery for asymptomatic carotid stenosis. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/08/110817175909.htm
University of Western Ontario. "Better diagnostics could reduce risky surgery for asymptomatic carotid stenosis." ScienceDaily. www.sciencedaily.com/releases/2011/08/110817175909.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

House Republicans Vote to Sue Obama Over Healthcare Law

House Republicans Vote to Sue Obama Over Healthcare Law

Reuters - US Online Video (July 31, 2014) The Republican-led House of Representatives votes to sue President Obama, accusing him of overstepping his executive authority in making changes to the Affordable Care Act. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Despite Health Questions, E-Cigs Are Beneficial: Study

Despite Health Questions, E-Cigs Are Beneficial: Study

Newsy (July 31, 2014) Citing 81 previous studies, new research out of London suggests the benefits of smoking e-cigarettes instead of regular ones outweighs the risks. Video provided by Newsy
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins