What is a stroke?
A stroke is an illness caused by a sharpviolation of cerebral circulation. It is characterized by a sharp (from several minutes to several hours) appearance of focal and / or cerebral neurological symptoms. It persists for more than a day, or leads the patient to death in a shorter period of time due to cerebrovascular pathology. That's what a stroke is.
Types of Stroke
There are some types of stroke:
- Cerebral infarction
- Hemorrhage in the brain
- Subarachnoid haemorrhage
- These three types of stroke have etiopathogenetic and clinical differences.
If we take into account the regression time of the neurologicaldeficiency, we can identify transient disorders of cerebral circulation - when the regress of the neurologic deficit occurs within a day, in contrast to your own stroke, or a small stroke - when the regress of the neurologic deficit occurs within a few weeks after the onset of the disease. The second place is occupied, in the structure of mortality, by cerebral vascular diseases, in comparison with diseases of the circulatory system after ischemic heart disease.
It is also called the cerebral infarction. Ischemic stroke, the causes of this disease can be different, but quite often it occurs and occurs in sick people who are over 60 years old and have a history of myocardial infarction, diabetes mellitus, rheumatic heart diseases and heart rhythm disturbances. An enormous role in the development of this disease is played by the pathology of the arterial arteries and the violation of the rheological properties of the blood. The development of the disease most often occurs at night and is not accompanied by loss of consciousness.
Or in a different way a hemorrhage into the brain. Hemorrhagic stroke, the causes that lead to hemorrhage is hypertension, or high blood pressure. That leads to damage to the vessels, and the vessels lose their elasticity and become more brittle. In this case, the walls of the vessels simply can not stand, and their rupture occurs, which causes bleeding.
Stroke - Causes
- Ischemic stroke, most often caused by a thrombus or embolism, which causes blockage of blood flow to the brain.
- Hemorrhages in the brain can be caused byuncontrolled high blood pressure, head injuries or an aneurysm. Elevated blood pressure is a frequent cause of cerebral hemorrhage, which destroys small arteries in the brain. This destruction deprives the brain cells of blood and greatly increases the pressure on the brain.
- Aneurysms are also considered a common causesubarachnoid hemorrhage. When an aneurysm ruptures, blood spills between the surface of the skull and the brain, and blood vessels cause spasms in the brain. Aneurysms are caused or aggravated by high blood pressure.
- Defect of a specific gene can also lead to fatal aortic diseases, coronary arteries and to a stroke.
- Rarely, stroke occurs from hemorrhage due to rupture of arteriovenous malformation (AVM).
- AVM is considered an abnormal ball of thin-walled vessels, already available at birth.
Symptoms of a stroke
Cells of the brain begin to die after a fewminutes after the stroke, then there are symptoms that need to be recognized, because surgical treatment plays a big role in the recovery of these cells. So, let's consider what are the symptoms:
- The head begins to spin, there are noticeable problems with walking, coordination and balance are lost
- Become visible speech problems
- There is numbness, noticeable weakness or even paralysis of one side of the body
- Vision becomes blurred, double or blackens in the eyes
- A sharp headache
There are also strokes, which are poorly expressedsymptoms. Such strokes may not cause any specific manifestations, but ultimately also destroy the brain tissue.