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Ischemic stroke hospitalizations decline in middle-aged, elderly, increases in young

Date:
February 9, 2011
Source:
American Heart Association
Summary:
The prevalence of ischemic stroke has declined in the middle-aged and elderly, but sharply increased in children, young adults and early middle-aged people since 1994, according to an analysis. Researchers are unclear on the reasons for the increase, but said obesity and hypertension may be factors.

The number of acute ischemic stroke hospitalizations among middle-aged and older men and women fell between 1994 and 2007, but sharply increased among those under age 35 -- including teens and children -- according to research presented at the American Stroke Association's International Stroke Conference 2011.

Analysts at the U.S. Centers for Disease Control and Prevention (CDC), reviewing hospitalization data by age and gender, identified declining rates of 51 percent in girls 0-4 years and 25 percent in men and 29 percent in women over 45.

However, the number of ischemic stroke hospitalizations increased 51 percent in males between ages 15 and 34 during the period studied. The rate increased 17 percent in females between 15 and 34.

Among children and teens, they found a 31 percent increase in boys between 5 to 14 years and a 36 percent increase among girls 5 to 14 years.

Among the younger middle-aged set, they found a 47 percent increase among men 35-44 and a 36 percent increase among women 35-44.

"I believe this is the first large study to report these findings, stratified by age and gender," said Xin Tong, M.P.H., a health statistician with the CDC's Division for Heart Disease and Stroke Prevention in Atlanta.

"We cannot link anything in particular to the trend in younger patients, but I believe the role of obesity and hypertension will prompt a big discussion. Unfortunately, right now we can't speculate on the causes."

The unit of analysis was hospitalization, so researchers couldn't draw any firm connections or determine what factors are driving the increase in ischemic stroke cases among the young. Ischemic stroke occurs when blood supply to the brain becomes obstructed, usually by a clot or narrowing of the arteries. The risk of long-term brain damage can be reduced significantly if patients receive the clot-busting tissue plasminogen activator (tPA) within three or four and a half hours after stroke onset.

Hospitals and physicians should be aware of the rising risk of stroke in young people, and the necessity to educate them about stroke symptoms, Tong said.

"Acute ischemic stroke is currently considered something that mostly happens to older people, but awareness of rising rates in the young is important or else tPA and other important stroke treatment may be unnecessarily delayed in younger patients," she said.

Tong said her group is pursuing additional investigation on this subject.

Co-authors are: Elena V. Kuklina, M.D., Ph.D.; Cathleen Gillespie, M.S.; and Mary G. George, M.D., M.S.P.H.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Cite This Page:

American Heart Association. "Ischemic stroke hospitalizations decline in middle-aged, elderly, increases in young." ScienceDaily. ScienceDaily, 9 February 2011. <www.sciencedaily.com/releases/2011/02/110209121655.htm>.
American Heart Association. (2011, February 9). Ischemic stroke hospitalizations decline in middle-aged, elderly, increases in young. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/02/110209121655.htm
American Heart Association. "Ischemic stroke hospitalizations decline in middle-aged, elderly, increases in young." ScienceDaily. www.sciencedaily.com/releases/2011/02/110209121655.htm (accessed July 31, 2014).

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