Pathophysiology:
Stroke, previously known as cerebrovascular accident (CVA) is defined as ‘a sudden impairment of cerebral circulation in one or more of the blood vessels supplying the brain. It interrupts or diminishes oxygen supply, causing serious damage or necrosis in brain tissues’ (Pathophysiology made Incredibly Easy 2006). A person suffering a stroke can present one or more of the following symptoms, weakness or numbness or paralysis of the face, arm or leg on either or both sides of the body, difficulty speaking or understanding dizziness, loss of balance or an unexplained fall, loss of vision, sudden blurring or decreased vision in one or both eyes, headache and difficulty swallowing (National Stoke Foundation 2012). There are two types of stroke, haemorrhagic stroke and ischaemic stroke. In the case of Mr Shaw he has experienced a left sided ischaemic stroke. An ischaemic stroke is ‘a cerebrovascular disorder caused by deprivation of blood flow to an area of the brain, generally as a result of thrombosis, embolism or reduced blood pressure’ (Harris, Nagy & Vardaxis 2010).