Although stroke mortality was significantly reduced by about 90% in 1950, can the number still hovers around the neck of 30% and soon the world’s leading cause of death. Among those who survive, about half stay for life and the experience of many a repeat in the coming weeks, months or years off.
Race results from the obstruction of a blood vessel, usually outside the brain, but sometimes also in the brain itself. Factors that increase the risk of a stroke are a history of transient ischemic attacks, arteriosclerosis, high blood pressure, kidney disease, arrhythmias (atrial fibrillation, in particular), rheumatic heart disease, diabetes, orthostatic hypertension, cardiac enlargement, high cholesterol, smoking, lack of exercise, use of contraceptives for a long time, overweight and family history of stroke. Women have additional risk factors for stroke such as oral contraceptives, which are not present in men. Cocaine-induced ischemic stroke in young patients is reported today.
The incidence of stroke exponentially from 30 years ago, and etiology varies by age, 95% of strokes occur in people over 45 years, and the two-thirds of all strokes occur in people over 65 years. Traditionally, men have a higher risk of stroke than women, but women are beginning to catch up to men five or 10 years after menopause. While stroke is more common in older people, people can suffer all ages and fitness levels from the injury. Risk of dying if he or she rises with age has a stroke.
Stroke is rare in children represent only a small percentage of cases of stroke per year. Stroke in children is often secondary to congenital heart defects, abnormalities of the intracranial vessels of genetic diseases and blood disorders such as thrombophilia.
Types of Stroke
Stroke can be divided roughly into two categories: ischemic and hemorrhagic, 80% of strokes are caused by ischemia, the balance bar, bleeding.
The main causes of stroke are thrombosis, embolism, and bleeding.
- Thrombosis is the most common cause of middle-aged and older people because they tend to have a higher incidence of pest infestation, diabetes or high blood pressure. It can occur at any age, especially for those with a history of rheumatic heart disease, endocarditis, cardiac arrhythmias, or after open heart surgery.
- An embolism is the second leading cause of stroke. An embolism is when a blood vessel is blocked by a blood clot, tumor, fat, bacteria, and air. Emboli usually develop within 10 to 20 seconds and without warning, and when they reach the brain, the traffic by staying in a narrow part of an artery, causing swelling and tissue death cut.
- Bleeding of the third most common form of stroke that is more common in women than men, such as embolism may suddenly occur at any age. It results from chronic hypertension or aneurysms that cause a sudden rupture of an artery.
The Symptoms and Signs of the Disease
Race is often associated with the loss of sensory and motor function on one side of the body (85% of ischemic stroke patients have hemiparesis), changes in vision, approach or the ability to speak or understand, or sudden severe headache clinical characteristics of stroke vary according to hit the blood vessel and a part of the brain, the ships of the damage and the ability of the affected area for the decreased blood supply through collateral circulation compensation.
Strokes on the left side of the brain affecting mainly the right half of the body, and vice versa. Most forms of stroke are not associated with a headache, apart from subarachnoid hemorrhage and cerebral venous thrombosis and intracerebral hemorrhage occasionally.
The symptoms are affected usually classified according to the blood vessel; a middle cerebral artery. Difficulty swallowing, difficulty speaking, visual field loss and paralysis on one side, in particular.