Posted by Chantel Martiromo, Article By Kyle J. Norton
What is stroke?
Stroke is defined as condition in which the brain function is interrupted rapidly due to the loss of blood supply
as a result of the blockage of blood such as thrombosis and arterial
embolism, or leakage of blood causes of the death of brain cells,
according to the article of Mitochondria, oxidative metabolism and cell death in stroke by Sims NR, Muyderman H (September 2009).
Stroke is caused by cholesterol build up in the arteries and high blood
pressure. In other words, if cholesterol building up in the arteries is
blocking the circulation of blood in any part of the body causing
oxygen not to be delivered to the brain, resulting in some cells in the
brain to die off and are unable reproduce,
Besides cancer and heart
diseases, stroke is the third leading cause of death. Approximate 1/4 of
all stroke victims die as a direct result of the stroke or it's
Women and stroke
to the statistic of the Heart and Stroke Foundation, strokes kill 45%
more women than men in Canada. In the study, published in the journal Neurology,
researchers from the University of California at Los Angeles monitored
17,000 people over a period of six years. They found the incidence of
stroke rising faster among women than men.When women reach the age of
45, the risk of stroke begins to rise rapidly, it may be due to levels
of estrogen has dropped significantly at age 45 and onward.
Types of stroke
1. Ischemic stroke
is the most common type of stroke accounting for almost 80% of all
strokes. The brain depends on its arteries to bring fresh blood from the
heart and lungs. The blood carries oxygen and nutrients to the brain,
and takes away carbon dioxide and cellular waste. If an artery is
blocked then the brain cells may not receive enough oxygen. They then
cannot make enough energy and will eventually stop working.
a) If blood clots from the inside of the arteries of the brain, we have thrombotic stroke.
Study shows that this type of stroke is responsible for almost 50% of all strokes. The most common problem is narrowing off the arteries in the neck or head.
If blood clotted in other parts of the body's arteries subsequently
entering the brain, we have embolic stroke. In this case the clot was
formed somewhere other than in the brain itself.
The clot then
travels the bloodstream until they become lodged and can not travel any
further. This naturally restricts the flow of blood to the brain and
results in embolic stoke.
2. Hemorrhagic strokeHemorrhagic stroke occurs when a blood vessel bursts inside the brain, causing an increase of the fluid pressure on the brain and harms the brain by pressing it against the skull. Hemorrhagic stroke is associated with high blood pressure, which stresses the arterial walls until they break.
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