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Heart Disease Health Center

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Treatment for Heart Attacks Can Begin in the Ambulance

WebMD Health News

May 23, 2000 -- Researchers in Canada say that more patients who suffer heart attacks should receive a life-saving treatment with clot-busting drugs before they even reach the hospital, especially if they live far from the facility.

Furthermore, they say, too many heart-attack victims delay getting any kind of care because they don't realize they are having an attack.

The researchers, whose article on the topic was published in the Journal of the American Medical Association, reviewed studies that looked at the survival of people who got the therapy -- called thrombolysis -- before reaching the hospital, in such places as an ambulance or mobile intensive-care unit, compared to those who got it at the hospital. Thrombolysis medications include tPA, which is also commonly given as soon as possible after people have had a stroke.

Led by Laurie J. Morrison, MD, director of research in the division of prehospital care at Sunnybrook and Women's Health Sciences Centre in Ontario, the researchers found that those who got the medication before hospitalization lived about 200 days longer than those who got it after arriving. They say this was especially important for patients who had to travel more than an hour to reach a hospital.

"My ultimate goal is to encourage people to think about this in a rational way," Morrison tells WebMD. Prehospital treatment can reduce deaths, she says, "and the impact where it will be felt is where the transfer is long, in rural communities"

Morrison says that health care providers in rural or remote communities should be able to perform this early treatment, given adequate training. "Prehospital thrombolysis is very expensive," she says. "There is a lot of time and training and education that is needed to maintain thrombolysis in the field."

She is conducting further studies to determine the value of early treatment with clot-busting drugs in an urban setting. The transit time to her own facility in Ontario, for example, averages around 20 minutes.

But another cardiologist tells WebMD that it would be impractical to set up systems to administer this treatment outside the hospital. "I think it is highly likely that outpatient therapy does confer some additional benefit," says David L. Pearle, MD, a professor in the department of medicine and director of the coronary care unit at Georgetown University Medical Center in Washington, D.C. But, he says, the actual benefit is relatively small, as shown in these studies.

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