Stroke, cerebrovascular accident (CVA), occurs when the blood supply to the brain is obstructed by a clot or hemorrhage of a blood vessel in the brain (Wang, Kapellusch, & Garg, 2014). The lack of oxygen to the brain will result in necrosis of brain cells/tissues within the first couple of minutes. There are 3 three classifications for stroke: (1a) ischemic stroke, the artery that supplies oxygen-rich blood to the brain is blocked; , (2b) hemorrhagic stroke, an artery in the brain leaks blood or ruptures; , and (3c) transient ischemic attack, which are mini strokes leaving the brain without oxygen for no more than 5 five minutes and is a warning sign for future stroke (Center for Disease Control and Prevention, 2015).
