1 in 8 strokes is preceded by 'warning stroke'

Sep 28, 2009

One out of every eight strokes is preceded by a "warning stroke," which is a transient ischemic attack (TIA) or mild stroke, according to research published in the September 29, 2009, print issue of Neurology.

"These results illustrate the need for better risk assessment tools for preventing strokes before they occur," said study author Daniel G. Hackam, MD, PhD, of the University of Western Ontario in London, ON. "Other studies have shown that up to 80 percent of strokes after TIA can be prevented when risk factors are managed intensively."

For the study, researchers identified all people at Ontario hospitals with a diagnosis of over four years. Of the 16,400 patients, 2,032, or 12.4 percent, had a TIA prior to the stroke. During a TIA, last for less than 24 hours and then resolve.

Those who did not have a warning stroke were more likely to have a more serious stroke than those who did have the warning stroke. Those with no warning were more likely to die while at the hospital (15.2 percent compared to 12.7 percent), more likely to have a heart arrest while in the hospital (4.8 percent compared to 3.1 percent) and less likely to be able to go home after the hospital stay, rather than to a nursing home or rehabilitation center (40.1 percent compared to 43.1 percent).

Those with the warning stroke were typically older than those without warning strokes. They were also more likely to have diabetes, and heart problems.

"It's possible that the blood vessels of those with warning strokes were preconditioned to the lack of blood flow, which protected them from the full result of the larger stroke. Any person who experiences even a should get to the emergency room immediately."

Source: American Academy of Neurology (news : web)

Explore further: Researchers have developed a computational framework for standardizing neuroscience data worldwide

add to favorites email to friend print save as pdf

Related Stories

Women less likely to have a stroke after mini-stroke

Feb 23, 2009

30 days after a transient ischemic attack, women are 30 percent less likely to have a stroke than men, according to researchers at the University of Alabama at Birmingham (UAB) and Yale University. The analysis, including ...

Do you know you're having a stroke?

Nov 25, 2008

A Mayo Clinic study shows a majority of stroke patients don't think they're having a stroke -- and as a result -- delay seeking treatment until their condition worsens. The findings appear in the current issue of Emergency Me ...

Hundreds of strokes avoidable, says study

Nov 26, 2007

Hundreds of strokes could be prevented each year if patients suffering ‘mini strokes’, known as transient ischaemic attacks or TIAs, were assessed sooner by specialist clinicians.

Recommended for you

Researchers unlock mystery of skin's sensory abilities

22 hours ago

Humans' ability to detect the direction of movement of stimuli in their sensory world is critical to survival. Much of this stimuli detection comes from sight and sound, but little is known about how the ...

Tackling neurotransmission precision

Dec 18, 2014

Behind all motor, sensory and memory functions, calcium ions are in the brain, making those functions possible. Yet neuroscientists do not entirely understand how fast calcium ions reach their targets inside ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.