There are many causes of stroke. It is in most cases of stroke caused by a reduced blood supply, usually create by a blood clot blocking a vessel in the brain. Sometimes it bleeds a brain behind it. There are also some rare causes of stroke, such as inflammation of the brain vessels. Learn all about the different causes of stroke risk factors and stroke!
Stroke No. 1 cause. hypoperfusion
Acute minority or hypoperfusion (ischemia) in certain regions of the brain is the most common of all causes of stroke. It is responsible for 80 to 85 percent of all cases of stroke. Doctors refer here to an ischemic stroke or a stroke. Why is there a lack of blood flow to certain areas of the brain, they may have different reasons. The most important are:
The vascular occlusion by a blood clot
Very often it arises from ischemic stroke a blood clot (thrombus) has a brain vessel, so that the supply of blood and oxygen in a brain region to interrupt. The thrombus is often in the heart (as in atrial fibrillation) or carotid artery “calcified” and was swept from the bloodstream into the brain. The closure of a container for medical blood clot strand call thromboembolism.
vascular bloke “calcification” (atherosclerosis)
cerebral vessels of the brain itself or vessels in the neck (like the carotid artery) arteriosclerotically can “calcify” diet: even reduced along deposits on the inner wall of an increasingly close or glass. In most cases, it is the large neck and cerebral arteries, which means that a larger part of the brain is cut off by the closing of the offer. But sometimes even very small cerebral arteries are closed, so that only small areas of the brain are not enough blood (microangiopathy).
The prevention of stroke in atrial fibrillation
Patients with cardiac arrhythmias, such as atrial fibrillation suffer a particularly high risk of stroke. Anticoagulants can very effectively prevent the formation of blood clots, thereby preventing a stroke. They offer patients an effective risk protection.
Cause of stroke. 2: cerebral hemorrhage
Bleeding in the brain
In a sudden cerebral hemorrhage of such vessels in the brain ruptures and blood leaks directly into the surrounding brain tissue. The trigger is usually hypertension: A long vessels and hypertension not (sufficiently) is damaged, so they can break suddenly. The brain contains an event like a stroke caused by a brain hemorrhage he said.There are also other causes of stroke, which is based on intracerebral hemorrhage. For about a congenital vascular malformation (such as an aneurysm) in the brain to tear abruptly. Other diseases and addictions are the possible causes of cerebral hemorrhages. Sometimes the cause of cerebral hemorrhage is unknown.
Bleeding between meninges
Two to five percent of all strokes is based on blood flow in space is called meningitis: This is ripped with a liquid space between the spinal meninges or medium (Spinngewebshaut arachnoid) and inner skins (pia pia or) fills. Because as subarachnoid hemorrhage is in most cases a spontaneous aneurysm (congenital malformation with bulge vascular enlargement of the vessel wall).
Rare causes of stroke
Stroke can be particularly younger people are other causes such as hypoperfusion or cerebral hemorrhage. In some patients, cerebrovascular accident, for example, on the basis of inflammation of the walls of blood vessels (vasculitis). Such vascular inflammation associated with autoimmune diseases such as giant cell arteritis, Takayasu’s arteritis, Behcet’s disease and systemic lupus erythematosus occur.
Stroke: risk factors
Ictus not come from nowhere. There are several factors that can contribute to its development. Some of these risk factors for stroke can not influence: age and genetic predisposition. The risk of stroke increased, so that people who are or have close relatives who have had a stroke in later life. But there are also stroke risk factors that can actively reduce your:
High blood pressure (hypertension) leads to atherosclerosis, which means that the deposits formed on the inner wall of blood vessels, which allows them to do more. This promotes a stroke. So hypertensive patients are the odds of six to eight times higher for stroke as those without hypertension. Concerns: The worst of the pressure, the greater the likelihood of a stroke.
Smoking decreases the amount of oxygen in red blood cells (RBCs) are transported are not allowed. The tissues and organs obtained by less oxygen, such as the brain. This follows, the bone marrow to produce more red blood cells to carry oxygen. The increase in the number of red blood cells, but the “concentrated” blood, thus by poor flowing the narrowed vessels.
heavy alcohol – either regularly or rarely so – increases the risk of stroke. In particular, it increases the risk of cerebral hemorrhage. moderate regular drinking, however, is a suspected protective effect. But it is not clearly documented. In addition, regular consumption of alcohol obviously leads to other health threats (potential for dependence, the increased risk of cancer) and therefore are not recommended.
Cholesterol and other lipids in the blood are a part of the deposits which are deposited in atherosclerosis in the inner walls of blood vessels. therefore, increase the high levels of blood fats (such as high cholesterol), the risk of stroke atherosclerosis. But it is between the “good” cholesterol HDL and LDL “bad” must be distinguished: high LDL cholesterol and total cholesterol promotes atherosclerosis, HDL cholesterol seems more protective effect on the vascular walls readings.
Diabetes mellitus (diabetes)
There is a clear link between diabetes and stroke: diabetes damages the blood vessel walls, thus thicken – its diameter decreases, which affects blood flow. In addition, aggravates atherosclerosis existing diabetes. Overall, more than two or three times the risk of stroke that results from people with diabetes who are not diabetic.
Narrowed carotid artery
A narrowed carotid artery (carotid stenosis) is also one of the risk factors for stroke. Shrinkage is based in most cases on arteriosclerosis. Often, they have long been uncomplaining.