subject: What Causes A Stroke [print this page] What Causes A Stroke What Causes A Stroke
A stroke is an unexpected condition which manifests when a blood clot or ruptured artery or blood vessel reduces blood flow to an area of the brain. A decrease in oxygen and glucose (sugar) going to the brain will result in the death of brain cells and brain deterioration, which usually causes a defect in speech, movement, and memory, which are quite often permanent.
The 2 major types of stroke are ischemic stroke and hemorrhagic stroke. Ischemic stroke is far more widespread and is responsible foran estimated 75% of all cases of strokes and will manifest when a blood clot, or thrombus, develops that restricts blood flow to a portion of the brain. If a blood clot forms in another area of the body and separates and begins to move errantly throughout the body, it is considered an embolus. This moving clot may be taken through the bloodstream to the brain where it can prompt an ischemic stroke. A hemorrhagic stroke will manifest when a blood vessel on the brain's surface ruptures and fills the space discovered directly between the brain and skull with blood this is also known as a subarachnoid hemorrhage. It may also materialize when a deficient artery within the brain ruptures and fills the nearby tissue with blood this is also known as a cerebral hemorrhage. Both types of conditions will bring about a reduction in blood flow to the brain and an make up of blood in specific regions of the brain that adversely increases pressure within the brain.
Ischemic strokes are unmistakablythe result of a thrombus or embolus that blocksblood supply to the brain. Blood clots or thrombus clots genrerally appear in regions of the arteries that have been injured by atherosclerosis which is an accumulation of plaques. Embolus are usually encouraged by atrial fibrillation which is an irregularity in the pattern of the heart beat that will lead to the formation of a blood clot and poor circulation.
Hemorrhage strokes can be promoted by rampant high blood pressure, an injury to the head, or aneurysms.
Elevated blood pressure level is the most widespread cause of cerebral hemorrhage. It will cause small arteries within the brain to explode. This reduces blood flow to the brain cells and inevitably increases pressure within the brain which may lead to a decrease in the brain's ability to function. Any impairment experienced is likely irreversible.
An aneurysm which is an irregular blood-filled pouch that balloons from the deterioration in the wall of an artery is typically the causative agent of a subarachnoid hemorrhage. If an aneurysm ruptures, blood will flow into the area between the surface of the brain and skull. This may also induce spasms within the blood vessels of the brain. Aneurysms are normally prompted and worsened by high blood pressure.
If you experience symptoms inclusive of a sudden acute headache accompanied by slurred speech, vision impairment, coordination problems, weakness in the muscles within the face, arms and legs, acquire emergency treatment promptly to lessen the risk of serious complications or death from a possible stroke.
