Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Simple Test May Help Identify People at Risk of Stroke

19.08.2011
A new study shows that a simple ultrasound test may help to identify people at high risk of stroke who have a condition called asymptomatic carotid stenosis, a narrowing of the carotid artery found in the neck, in which few or no symptoms are present. The research is published in the August 17, 2011, online issue of Neurology®, the medical journal of the American Academy of Neurology.

“There is debate over how to best treat people with asymptomatic carotid stenosis. A procedure called carotid endarterectomy can reduce the risk of stroke, but there are risks and costs involved with the surgery. Identifying people with asymptomatic carotid stenosis who are at higher risk of stroke would help determine whether carotid endarterectomy is needed,” said study author Raffi Topakian, MD, of the Academic Teaching Hospital Wagner-Jauregg in Linz, Austria.

The surgery removes the plaque buildup in the carotid artery, which is the main artery from the heart to the brain.

For the study, 435 people with asymptomatic carotid stenosis were followed for two years. They underwent ultrasound of the carotid artery and of blood vessels in the brain to determine whether two markers for high risk of stroke were present. The markers were signs of blood clots passing into the brain, and a type of carotid plaque called echolucent plaque, which has a higher fat content than other plaque.

Of the participants, 164 people had echolucent plaque, or 38 percent, and 73 people, or 17 percent, had at least one sign of a blood clot. Six percent, or 27 people, had both markers. During the study, 10 people had strokes and 20 people had transient ischemic attacks, or mini-strokes.

The study found that people with the echolucent plaque in their carotid artery were more than six times more likely to have a stroke than those people without the plaque. People who had the plaque and signs of blood clots were more than 10 times more likely to have a stroke than those without both markers. The results remained the same regardless of high blood pressure, diabetes, smoking and vascular disease.

“With further study, our results may lead to a simple, clinically applicable method for predicting future stroke in people with asymptomatic carotid stenosis and help to determine the best way to treat people with the disorder, such as selecting patients with asymptomatic carotid stenosis for carotid endarterectomy,” said Topakian. “This method identifies a high risk group with an annual stroke risk of about nine percent and a low risk group with an annual risk of less than one percent.

In an accompanying editorial, Lars Marquardt, MD, DPhil, of the University of Erlangen-Nuremberg in Germany noted that the overall risk of stroke among people with asymptomatic carotid stenosis is relatively low and has decreased in recent years due to better management through cholesterol and high blood pressure drugs. He also said that incorporating screening for plaque and blood clots in people with no symptoms may be difficult and costly.

The study was supported by the British Heart Foundation.

The American Academy of Neurology, an association of more than 24,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer’s disease, stroke, migraine, multiple sclerosis, brain injury, Parkinson’s disease and epilepsy.

For more information about the American Academy of Neurology, visit http://www.aan.com.

VIDEO: http://www.youtube.com/AANChannel
TEXT: http://www.aan.com/press
TWEETS: http://www.twitter.com/AANPublic

Angela M. Babb | American Academy of Neurology
Further information:
http://www.aan.com

More articles from Studies and Analyses:

nachricht New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)

nachricht Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>