Navigation Links
New Stroke Therapies Show Promise
Date:2/22/2008

Clot buster works longer than thought, lowering blood pressure limits damage, and vacuum device sucks up clots safely for 8 hours

FRIDAY, Feb. 22 (HealthDay News) -- Several new studies point to the promise of new ways to treat different types of stroke.

The research was presented during a teleconference Friday at the American Stroke Association's International Stroke Conference in New Orleans.

The first trial found some benefit when tPA, the only approved therapy for acute ischemic stroke, was given outside the usual three-hour treatment window. Patients in this Australian trial who were given tPA three to six hours after having a stroke had increased restoration of blood flow and a smaller area of the brain was deprived of blood. The study was expected to be published in the April issue of The Lancet Neurology, but was released Friday to coincide with the meeting presentation.

Ischemic stroke involves an obstruction in one of the vessels supplying blood to the brain. Currently, "clot busters" are only considered effective for the first three hours after a stroke.

"The issue is that we've got a three-hour label, and can we extend that to six hours," said study author Dr. Stephen M. Davis, of Royal Melbourne Hospital. "Based on our results, it gives a lot of encouragement that you can enrich that population. A lot of people arrive too late, and these are ones we would be targeting."

The findings are enough to warrant further trials but not to change current clinical guidelines just yet.

"This should be viewed as very encouraging, as an intermediate step that's leading to the formation hopefully of a larger study that can be more definitive and that could impact our guidelines significantly," said Dr. Philip Gorelick, moderator of the teleconference and head of the department of neurology and rehabilitation at the University of Illinois at Chicago.

A second study looked at patients in China, South Korea and Australia with acute cerebral hemorrhage, the most serious form of stroke.

"High blood pressure is a cause of intercerebral hemorrhage and is also very common at [the] acute state, and we don't know what to do about it," said study author Dr. Craig Anderson, from the University of Sydney in Australia. "We believe that having high blood pressure causes extra bleeding and expansion of blood in the brain. If we can bring blood pressure down, we may be able to arrest bleeding in the brain and bring it under control."

In fact, intensive lowering of blood pressure arrested about half a teaspoon of blood and, Anderson said, "in real life, it might have a bigger treatment effect."

Again, the authors hope the findings will lead to funding for larger trials.

A third trial found that reducing blood pressure in the 60 percent to 70 percent of patients who have elevated levels following acute stroke resulted in reduced dysphasia (communication problems) and some mortality benefits.

"These are very small numbers, and I don't want to hang too much on those results, but I think it's very encouraging, so we can probably go forward and do a much larger phase 3 study," said British study author Dr. John Potter.

For now, Gorelick said, "we continue to recommend that physicians follow American Heart Association/American Stroke Association guidelines. The blood pressure [issue] has not been resolved, and there are important questions of what to do with blood pressure. . . [although] it would be nice to have a definitive plan here and get people on blood pressure-lowering medicine."

Other studies being presented at the conference found that:

  • The recently approved Penumbra device, a "vacuum cleaner" which sucks clots out of the brain, was effective for eight hours after the onset of a stroke, adding five hours to a patient's treatment window.
  • Aricept (donepezil) improved several measures of executive function and processing speed in patients with a subcortical form of vascular dementia but did not improve overall cognitive scores, according to researchers from the University of Muenchen in Muenchen, Germany.
  • Certain chromosomal regions may harbor genes important in assessing individuals at risk for aneurysms. "This is a critical first step if you want to find genes," said study author Dr. Tatiana Foroud, of Medical & Molecular Genetics in Indianapolis. "The ultimate goal is a genetic test to identify individuals at higher risk for aneurysm, and those individuals could have targeted and more costly screening pursued on a regular basis."

More information

Visit the American Stroke Association for more on different types of stroke.



SOURCES: Feb. 22, 2008, teleconference with Philip Gorelick, M.D., John S. Garvin professor and head, department of neurology and rehabilitation, University of Illinois at Chicago; Stephen M. Davis, M.D., Royal Melbourne Hospital, Australia; John F. Potter, D.M., United Kingdom; Craig Anderson, M.D., Ph.D., University of Sydney, Australia; Tatiana Foroud, M.D., Medical & Molecular Genetics, Indianapolis; April 2008, The Lancet Neurology


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Study, meta-analysis examine factors associated with death from heatstroke
2. High alcohol consumption increases stroke risk among Chinese men
3. Heavy Drinking Boosts Stroke Risk for Chinese Men
4. High alcohol consumption increases stroke risk, Tulane study says
5. Broad-based group of physicians calls for improvement in stroke treatment
6. Continued Statin Use Boosts Post-Stroke Outcomes
7. U.S. Initiative Seeks to Boost Hispanic Stroke Awareness
8. Stopping Statins After Stroke Doubles Death Risk
9. Can brain-injured, partially-blind stroke patients regain some of their lost vision?
10. REACH Registry Highlights That Patients With Peripheral Arterial Disease (PAD) Suffer High Rates of Heart Attack, Stroke, Hospitalization, and Death
11. Link Between Air Pollution, Stroke Gets Clearer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New Stroke Therapies Show Promise
(Date:3/24/2017)... MN (PRWEB) , ... March 24, 2017 , ... ... back to the military at the same time by providing Prehospital Trauma Life ... Guard. PHTLS is the world’s premier prehospital trauma education developed in cooperation with ...
(Date:3/24/2017)... ... 24, 2017 , ... According to a new study by NCPA Senior Fellow ... obey the rules Congress has directed the CBO to follow. The CBO itself previously ... restore. Yet, it estimates a reduction in employer-based coverage due to the GOP reform, ...
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... ... over $100,000 for its innovative EcoQube Frame vertical micro-veggies garden on Kickstarter ... demand for the product – with nearly 2,000 consumers (and counting) already backing ...
(Date:3/24/2017)... (PRWEB) , ... March 24, 2017 , ... Viewers who ... variety of critical historical facts, cultural practices, goods, services, and societal issues tend to ... will look into the popular practice of utilizing running events for causes around the ...
(Date:3/24/2017)... ... 24, 2017 , ... “End Time GPS”: a dauntless and enlightened study ... Time GPS” is the creation of published author, Wesley Gerboth, a World War II ... and space-vehicle projects. Now, at age ninety-one, he shares the Wisdom God bestowed upon ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... INDIANAPOLIS , March 23, 2017  Eli Lilly ... William Sansum Diabetes Center have established a research collaboration ... diabetes through enhanced research, education and care. ... bears a disproportionate weight on Latino families in ... Kerr , M.D., FRCPE, director of Innovation and Research ...
(Date:3/23/2017)...  The U.S. Food and Drug Administration today granted ... adults and pediatric patients 12 years and older with ... not received prior chemotherapy. This is the first FDA-approved ... skin cancer. "While skin cancer is one ... form called Merkel cell cancer have not had an ...
(Date:3/23/2017)...   BioSpace , the leading biotechnology and pharmaceutical ... Indiana Biosciences Research Institute and over 20 dynamic ... to bring the state,s life sciences industry to the ... artistic representation of the region,s booming biotechnology and pharmaceutical ... Mike Pence , a long-time advocate of the ...
Breaking Medicine Technology: