Essay on The Biological Concepts And Mechanisms Of Strokes

1478 Words Dec 13th, 2016 6 Pages
The Biological Concepts and Mechanisms of Strokes A stroke is a deficit or blockage of oxygenated blood to a portion of the brain. According to the American Heart Association,”stroke is classically characterized as a neurological deficit attributed to an acute focal injury of the central nervous system by a vascular cause, including cerebral infarction, intracerebral hemorrhage, and subarachnoid hemorrhage, and is a major cause of disability and death worldwide (Sacco, 2013, Introduction, para. 1)." Important modifiable risk factors for stroke are high blood pressure, atrial fibrillation, lack of physical activity, illicit drug use, smoking, increased alcohol intake, hypercholesterolemia, diabetes mellitus, and an unhealthy diet. Symptoms attributed to strokes may be temporary or permanent. Symptoms attributed to strokes may be temporary or permanent and involve poor brain function, difficulty understanding or speaking, inability to feel one side of the body, loss of vision, balance and sever headaches. Two subtypes of stroke are ischemic and hemorrhagic. Hemorrhagic strokes can be further classified into intracerebral hemorrhage and subarachnoid hemorrhage. Ischemic strokes are caused by interruptions or blockages, of the blood supply to the brain, leading to dysfunction of the impacted area. There are three mechanisms why this may occur: thrombosis, lacunar, and embolism. A thrombotic stroke is caused by a rupture of an atherosclerotic plaque. Atherosclerosis…

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