When atrial fibrillation, myocardial infarction, with prosthetic heart valves, endocarditis infectious nature off embolus which closes the lumen of the vessel leads to ischemic brain tissue.When the occlusion of small vessels in myocardial infarction, diabetes, and high blood pressure can develop abdominal areas of necrosis in the brain.Therefore, do not form extensive areas of ischemic damage of the cerebral hemispheres and slight abdominal and called the lacunar stroke.The most common symptoms of this form of the disease erased.
This is a very serious disease - ischemic stroke, the cause of which can be summarized as follows:
- blood clot or cholesterol plaque breaks away from the wall and through the blood enters the small blood vessels of the brain.
- blood clot breaks away from the endocardial and closes the lumen of cerebral artery.
- case of violation of hemodynamics in heart failure and poor circulation an embolus from the heart gets into the carotid artery.
- lacunar cerebral ischemia on a background of hypertension and diabetes severe.
- case of injury can occur bundle artery that leads to cerebral ischemia.
Ischemic stroke has three degrees of severity.Allocate and focal cerebral symptoms.Headache, pain in the eyeballs, which is enhanced by their movement, nausea, dizziness and vomiting are common symptoms.
Its effects depend on the patient's age, localization of thrombosis, occlusion duration, development of collaterals and blood pressure.The more time has passed since the blockage and the more a place of defeat, the faster irreversible processes.Signs of ischemic stroke depend on the location of the occlusion.When plugging anterior cerebral artery affects the lower limbs, develops severe weakness, paresis or paralysis, impaired speech.
With the defeat of the posterior cerebral artery observed dysfunction of the cerebellum, brain stem, occipital and temporal lobes.There is difficulty in swallowing, respiratory depression and serious violations of the heart.Can disturbed coordination of movements, sensitivity to pain and temperature.Noteworthy Confusion up to coma, distortion of the face as a result of the defeat of the trigeminal and facial nerve paralysis of half the body.From the perspective of developing nystagmus, strabismus.
Ischemic stroke in the middle cerebral artery occlusion is characterized by impaired sensitivity and paralysis on the opposite side of the lesion.Disturbed sensitivity, develops paresis view, upper limbs and face.
When carotid artery thromboembolism develops paresis on the opposite side, and drops sharply vision on the side of the occlusion.
basilar artery occlusion ischemic stroke can manifest itself in different ways, depending on the level of destruction.Maybe tinnitus and hearing loss up to its loss, nystagmus and dizziness, vomiting and nausea.With the defeat in the trunk of the basilar artery or vertebral arteries can be observed complete paralysis, paresis of the eye-sided and coma.
process of ischemic brain tissue is reversible within 6-12 hours.Occasionally, when can we expect on the day.Therefore, it is important to correctly and promptly provide necessary medical aid to the patient, if there was an ischemic stroke.Provide him peace, stabilize the heart and lungs, spend prevention of complications.The important is to restore blood flow, protecting the brain from further damage, and the support of his normal diet.