Overview of a Stroke

909 Words4 Pages
People often know of strokes or someone affected by a stroke, but not always what constitutes a stroke. A stroke occurs when blood flow to the brain is interrupted or reduced due to a blockage or rupture of a blood vessel or artery that supplies blood to the brain. The interruption of blood flow deprives the brain of necessary nutrients and oxygen supplies, killing surrounding cells in the brain. There are three main types of strokes: ischemic stroke, hemorrhagic stroke, and transient ischemic stroke. Ischemic strokes occur due to an obstruction or clotting of a blood vessel or artery. There are two types of ischemic strokes: embolic and thrombotic strokes. An embolic stroke is when a blood clot or other substance forms in the body, travels through the blood stream, and eventually becomes lodged in a small blood vessel or artery supplying blood to the brain. A thrombotic stroke is when a blockage forms in one or more arteries to the brain. The second type of stroke, hemorrhagic stroke, is due to a rupture of a weakened blood vessel. There are two major ways in which blood vessels can weaken: aneurysm, a ballooning of a weak area in a blood vessel, and arteriovenous malformations (AVM), an abnormal connection of arteries to veins. A hemorrhagic stroke can either be an intraccerebral stroke, a bleed caused by a blood vessel within the brain, or a subarachnoid stroke, an aneurysm rupture in a large artery near the membrane surrounding the brain. Lastly, transient ischemic attacks are temporary traveling clots that cause “miniature” or “warning” strokes. There are many causes of strokes and risk factors that can increase likelihood of stroke. Causes include conditions such as atherosclerosis, also known as plaque build... ... middle of paper ... ...and Prevention. (2013, December 10). Stroke Facts. USA.gov. Retrieved January 17, 2014, from http://www.cdc.gov/stroke/facts.htm American Stroke Association. (2012, October 23). About Stroke. American Stroke Association. Retrieved January 18, 2014, from http://www.strokeassociation.org/STROKEORG/AboutStroke/About-Stroke_UCM_308529_SubHomePage.jsp National Stoke Association. (2014). What is stroke? National Stroke Association. Retrieved January 18, 2014, from http://www.stroke.org/site/PageServer?pagename=stroke Mayo Clinic. (1998). Disease and Conditions Stroke. Mayo Clinic. Retrieved January 19, 2014 from http://www.mayoclinic.org/diseases-conditions/stroke/basics/treatment/con-20042884 University Hospital Newark, New Jersey. (n.d.). Stroke Statistics. University Hospital Newark, New Jersey. Retrieved January 19, 2014, from http://www.uhnj.org/stroke/stats.htm

More about Overview of a Stroke

Open Document