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من طرف ابو يزن الإثنين أغسطس 24, 2009 2:22 pm]S
The factors that determine a person's risk of having a stroke include age, sex, heredity, lifestyle choices, and other medical problems:
• Age and sex. The risk of stroke increases with increasing age. Men are more likely to have a stroke than women.
• Heredity. Blacks, Asians, and Hispanics all have higher rates of stroke than do whites. People with a family history of stroke are also at greater risk.
• Lifestyle choices. Lifestyle choices that increase a person's risk for stroke include smoking, low level of physical activity, excessive alcohol consumption, or use of cocaine or other illegal drugs.
• Other medical problems. Stroke risk is higher for people with diabetes, heart disease, high blood pressure, previous stroke, obesity, high cholesterol level, or high red blood count.
• The primary goal in treating brain hemorrhages is to relieve pressure on the brain. Certain drugs can be used for this purpose. They include urea, mannitol, and the corticosteroids.
• In some cases, surgery can be used to treat brain hemorrhages. A surgeon can close off blood vessels that have ruptured (broken open) in order to stop bleeding and help reduce pressure on the brain.
Causes
Stoke is caused by blockage of blood flow or rupture of an artery to the brain.
According to the nature of blockage or rupture, causes can be divided as 3 types.
[size=24]troke (CVA)[/color]
Definition• A stroke is the sudden death of a portion of the brain cells due to a lack of oxygen. A stroke occurs when blood flow to the brain is damage resulting in abnormal function of brain. It causes by blockage or rupture of an artery to the brain.
• A stroke occurs when the arterial blood flow leading to or in the brain becomes blocked or ruptures.
• Blood carries oxygen and nutrients to the neurons (nerve cells) in the brain, so when the blood flow stops, the cells begin to die. As a result, the functions of the body controlled by the nerve cells can lose their
• Within a few minutes, brain cells begin to die.
[center]RISK FACTORS FOR STROKE
Definition• A stroke is the sudden death of a portion of the brain cells due to a lack of oxygen. A stroke occurs when blood flow to the brain is damage resulting in abnormal function of brain. It causes by blockage or rupture of an artery to the brain.
• A stroke occurs when the arterial blood flow leading to or in the brain becomes blocked or ruptures.
• Blood carries oxygen and nutrients to the neurons (nerve cells) in the brain, so when the blood flow stops, the cells begin to die. As a result, the functions of the body controlled by the nerve cells can lose their
• Within a few minutes, brain cells begin to die.
[center]RISK FACTORS FOR STROKE
The factors that determine a person's risk of having a stroke include age, sex, heredity, lifestyle choices, and other medical problems:
• Age and sex. The risk of stroke increases with increasing age. Men are more likely to have a stroke than women.
• Heredity. Blacks, Asians, and Hispanics all have higher rates of stroke than do whites. People with a family history of stroke are also at greater risk.
• Lifestyle choices. Lifestyle choices that increase a person's risk for stroke include smoking, low level of physical activity, excessive alcohol consumption, or use of cocaine or other illegal drugs.
• Other medical problems. Stroke risk is higher for people with diabetes, heart disease, high blood pressure, previous stroke, obesity, high cholesterol level, or high red blood count.
• The primary goal in treating brain hemorrhages is to relieve pressure on the brain. Certain drugs can be used for this purpose. They include urea, mannitol, and the corticosteroids.
• In some cases, surgery can be used to treat brain hemorrhages. A surgeon can close off blood vessels that have ruptured (broken open) in order to stop bleeding and help reduce pressure on the brain.
Causes
Stoke is caused by blockage of blood flow or rupture of an artery to the brain.
According to the nature of blockage or rupture, causes can be divided as 3 types.
[center] Emboli(distant clot)
Thrombosis(local clot)
Cerebral hemorrhage
Thrombosis(local clot)
Cerebral hemorrhage
Symptoms
Due to the lack of supply of oxygen, the brain cells could not perform their normal works The symptoms depend of which are the areas of the brain are affected.
• Hemiparesis or hemiplegia i-e weakness or paralysis of one side of the body or the other.
• Sensory loss i-e partial or complete loss of voluntary movement and sensation in legs or arms.
• Aphasia, or dysarthria in speech problems and weak muscles of the face cause drooling.
• Affect the functions of balance, vision, and swallowing or difficulty in breathing.
• loss of conciousness can be resulted or death.
• Disturbance of cognitive function i-e lose the ability to think or function
• Centeral facial palsy can be resulted
• A TIA is a:::: "warning stroke" or "mini-stroke" that produces stroke-like symptoms but no lasting damage. Recognizing and treating TIAs can reduce your risk of a major stroke.
• Most strokes aren't preceded by TIAs. However, of the people who've had one or more TIAs, more than a third will later have a stroke. In fact, a person who's had one or more TIAs is more likely to have a stroke than someone of the same age and sex who hasn't.
• TIAs are important in predicting if a stroke will occur rather than when one will happen. They can occur days, weeks or even months before a major stroke. In about half the cases, the stroke occurs within one year of the TIA.
• TIAs occur when a blood clot temporarily clogs an artery, and part of the brain doesn't get the blood it needs.
• The symptoms occur rapidly and last a relatively short time.
• Most TIAs last less than five minutes. The average is about a minute.
• Unlike stroke, when a TIA is over, there's no injury to the brain
symptoms of a TIA
It's very important to recognize the warning signs of a TIA or stroke. The usual TIA symptoms are the same as those of stroke, only temporary:
• Sudden numbness or weakness of the face, arm or leg, especially on one side of the body
• Sudden confusion, trouble speaking or understanding
• Sudden trouble seeing in one or both eyes
• Sudden trouble walking, dizziness, loss of balance or coordination
• Sudden, severe headache with no known cause
Complications
Depending on how long the brain suffers a lack of blood flow, a stroke can sometimes cause temporary or permanent disabilities. Stroke complications differ depending what part of the brain was affected and may include:
Paralysis or loss of muscle movement. Sometimes, a lack of blood flow to the brain can cause a person to become paralyzed on one side of the body, or lose control of certain muscles, such as those on one side of the face. With physical therapy, you may see improvement in muscle movement or paralysis.
Difficulty talking or swallowing. A stroke may cause a person to have less control over the way the muscles in the mouth move, making it difficult to talk, swallow or eat. A person may also have difficulty speaking because a stroke has caused aphasia, a condition in which a person has difficulty expressing thoughts through language. Therapy with a speech and language pathologist may improve this disability.
Memory loss or troubles with understanding. It's common that people who suffer strokes have some memory loss. Others may develop difficulty understanding concepts. This complication may improve with rehabilitation therapies.
Pain. Some people who have a stroke may have pain, numbness, or other strange sensations in parts of their body affected by stroke. For example, if a stroke causes you to lose feeling in your left arm, you may have an uncomfortable tingling sensation in that arm. You may also be sensitive to temperature changes, especially extreme cold. This is called central stroke pain or central pain syndrome (CPS). This complication may improve with time, but
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