To the arterial blood supply to the brain will because of chronic hypertension and suffered, and above the similar hurt Q vascular wall thickening and narrowing of the blood vessels, or the formation of a blood clot, prevent certain parts of the blood flow to the brain. The formation of blood clots in the brain called cerebral thrombosis, and can cause stroke. Depending on the different blood vessels, stroke patients may lose their ability to talk, walk or move up the body. Such as carotid artery off the blood clot with blood flow to the brain blood vessel blockage on the formation of the cerebral embolism from anywhere in the blood vessels in the body.
In addition, one or more projections are produced in the middle cerebral artery. These are cerebral aneurysms, which may eventually rupture, causing cerebral hemorrhage, and thus causing another type of stroke, which is usually caused by a more damage than the cerebral thrombosis. Stroke caused by cerebral hemorrhage is more likely to die from a stroke caused by a clot.
It is estimated that the United States has 50 stroke patients annually, of which about 25% -30% of people die, and in the United States, which makes the stroke has become the third common diseases caused by death. Even if there is no death after a stroke, the patient is usually very weak, stroke is the first cause of disability of the elderly in the United states. A stroke can cause paralysis, blindness, deafness, aphonia. Forgetful and a lot of other destructive effects.
80% a 70% of stroke patients with hypertension at the same time. The evidence suggests that a person with a blood pressure and untreated treatment, the probability of a stroke is almost 7 times those of a person who has a normal or high blood pressure. Even normal blood pressure and high blood pressure in patients with mild hypertension risk of stroke is also high. Controlling blood pressure is the best preventive measure to reduce the risk of stroke. Other preventive measures include not smoking, eating less fatty foods, more exercise and taking a small dose of aspirin.
A less common warning sign of a stroke is the so-called small stroke, which is a transient ischemic attack (TIA). Transient ischemic attack unlike explosive stroke that would cause permanent brain damage, small stroke stroke like symptoms lasts only a few minutes to several hours, and go away within 24 hours. Symptoms may include sudden weakness, clumsy, or upper hand. Feet or half face numbness. May also occur in visual impairment, visual acuity and can not speak or speak not coherent. If you have a transient ischemic attack, you should talk with their doctors about how to take preventive measures to prevent another attack, more important is how to prevent the outbreak of stroke onset.
As age increases, many people are worried that they may have to get Alzheimer’s disease, which mainly affects memory and other more advanced brain function, and that the blood supply to the brain may be reduced in older people with a memory disorder or a sudden onset of dementia (a mental decline). Multiple cerebral infarction dementia and Alzheimer’s disease, which can be stable by taking a small dose of aspirin and careful control of blood pressure.
No control of the development of severe hypertension in the course of the development of fiber protein like necrosis, and rapid rupture of blood vessels. This makes the blood and body fluid to leak into the brain, the intracranial pressure increased. Elevated intracranial pressure can cause symptoms such as headache and fatigue, if the pressure has not been reduced, the brain itself will be injured. However, with the great development of blood pressure control technology, this situation is now very rare.
Also, if the extremely dangerous to raised blood pressure, hypertension is a direct result of a called hypertensive encephalopathy of brain diseases. The symptoms of the disease include severe hypertension and disturbance of consciousness, intracranial (skull) with, damage to the retina and more lame attack.
Eyes are not involved in blood pressure regulation, but there are a lot of blood supply arteries in the eyes. These arteries can be seen in the Department of Ophthalmology when the doctor is examining the retina. If doctors find that these blood vessels rupture or shrink, then other arteries in the body may have similar damage. High blood pressure can lead to retinal (responsible for the reception of images from the lens) degradation, resulting in retinal diseases. The lesions of these ocular arteries showed a similar occurrence of the kidney.