Navigation Links
Using CT, radiologists can pinpoint cause of some strokes
Date:11/9/2010

OAK BROOK, Ill. Multidetector computed tomography (CT) helps pinpoint the causes of ischemic strokes, the most common type of stroke, potentially speeding the delivery of life-saving treatments, according to a study published online and in the January issue of Radiology.

"Our results suggest that multidetector CT could become the first-line imaging tool for identifying the cause of acute ischemic stroke," said the study's lead author, Loic Boussel, M.D., Ph.D., professor of radiology at Louis Pradel Hospital in Bron, France.

An ischemic stroke occurs when blockage in an artery, often from a blood clot or a fatty deposit due to atherosclerosis, interrupts blood flow to an area of the brain. This type of stroke can originate in the heart, in the form of a blood clot that travels to the head, or from blood vessels in the neck (extracranial carotid arteries) and head (intracranial arteries). According to the American Stroke Association, ischemic stroke accounts for approximately 87 percent of stroke cases.

Early determination of the cause of ischemic stroke is essential for secondary stroke prevention. Anticoagulant therapy to thin the blood is the treatment of choice for most of the cardiac sources of stroke, while surgery is needed for strokes caused by severe narrowing of the extracranial carotid artery.

Physicians use a combined imaging protocol to determine the cause of an ischemic stroke. The protocol typically includes duplex ultrasonography, MR angiography or CT angiography of the neck and brain vessels, and transthoracic and transesophageal echocardiography.

"This approach is time-consuming and expensive, and could delay secondary stroke prevention strategies," Dr. Boussel said.

In the new study, Dr. Boussel and colleagues analyzed the potential of multidetector CT as a faster and more cost-effective way to detect the main causes of ischemic stroke. The researchers compared a single-session multidetector CT examination of the heart, neck and brain vessels with established imaging methods in 46 patients who had recently experienced an ischemic stroke.

Almost half of the stroke cases had cardiac sources, while 20 percent of cases were caused by major arterial atherosclerosis.

Multidetector CT detected cardiac sources of stroke in 18 of 25 cases, for a sensitivity of 72 percent. The technique's sensitivity increased to 100 percent for detection of major arterial atherosclerosis. Overall, multidetector CT facilitated stroke classification in 38 of the 46 patients, or 83 percent.

"CT allows a fast diagnosis and helps to identify the cause of the stroke during a single examination," Dr. Boussel said. "Moreover, because it is quick, the exam is well tolerated, which is critical in acute stroke patients who may be unstable and agitated."

The CT protocol has two main limitations, according to Dr. Boussel. It exposes the patient to a significant radiation dose and requires two intravenous contrast material injections to study the chest and neck areas. Dr. Boussel said that advances in CT equipment technology could help reduce the radiation dose and the total amount of iodinated contrast material required.

Larger studies are needed to validate the results and to analyze the technique's cost-effectiveness.


'/>"/>

Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

Related medicine news :

1. Ecumen Building Senior Housing in Apple Valley, Minnesota and Will Manage New Maplewood, Minnesota Property
2. Using gold nanoparticles to hit cancer where it hurts
3. Johns Hopkins scientists develop personalized blood tests for cancer using whole genome sequencing
4. Register Online for this Year's Horst Senior Living Conference on April 8 Featuring Keynote Speaker and Senior Housing Expert Jim Moore
5. Rockland County Landlord Agrees to Settlement With United States to Protect Fair Housing Rights of Tenants With Mental Disabilities
6. Groundbreaking Study Using Ultrasound for the Treatment of Intracerebral and Intraventricular Hemorrhage Stroke Shows Promise
7. SDI Reports: Nearly a Third Of Physicians Use Handheld and Smartphone Devices to Access Medical Information - Physicians Most Likely to be Using Apple iPhone
8. Parrish Medical Center Sees 30 Percent Improvement in Mortality Using Real-Time Clinical Surveillance Solution from Thomson Reuters
9. Family history is strong predictor of obstructive coronary artery disease using CCTA
10. Using new approach, Mayo Clinic researchers find level of gene alters risk of Alzheimers disease
11. Best Selling, Non Toxic Skin Brightener Does the Job Using Safe, Healthy Ingredients and Introduces New Anti Aging Ingredients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... 13, 2017 , ... Ellevate Network, the leading network for professional women, brought ... gender equality at their inaugural Summit in New York City in June. The event ... audience of over 3 million. To watch the Mobilize Women video, click here ...
(Date:10/13/2017)... ... October 13, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at ... of the most popular and least understood books in the Holy Scriptures, Revelation. The ... that have baffled scholars for centuries. Many have tossed it off as mere rubbish, ...
(Date:10/13/2017)... ... October 13, 2017 , ... Coveros, a leader in agile ... a contract by the Center for Medicare and Medicaid Services (CMS). The Enterprise ... use of Agile methodologies in a consistent and high value manner across CMS ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: ... “America On The Brink” is the creation of published author, William Nowers. ... As a WWII veteran, he spent thirty years in the Navy. Following ...
(Date:10/12/2017)... , ... October 12, 2017 , ... ... now treating sleep apnea using cutting-edge Oventus O2Vent technology. As many ... sleep disorder characterized by frequent cessation in breathing. Oral appliances can offer significant ...
Breaking Medicine News(10 mins):
(Date:9/27/2017)... , Sept. 27, 2017  Commended for their devotion ... notable awards. Ranked as number one in the South Florida ... time in Inc. 5000 yearly list, the national specialty pharmacy ... Armando Bardisa will soon be honored by SFBJ ... Set to receive his award in ...
(Date:9/25/2017)...   Montrium , an industry leader in ... IQPC Trial Master Files & Inspection Readiness Conference ... Clinical Services has selected eTMF Connect ... EastHORN, a leading European contract research organization (CRO), ... to enable greater collaboration with sponsors, improve compliance ...
(Date:9/23/2017)... Sept. 22, 2017 Janssen Biotech, Inc. (Janssen) ... letter from the U.S. Food and Drug Administration (FDA) ... sirukumab for the treatment of moderately to severely active ... clinical data are needed to further evaluate the safety ... active RA. ...
Breaking Medicine Technology: