Brain cells must have a continuous supply of oxygen and other nutrients from the blood in order to function. There are four different types of stroke. Thrombotic stroke is the most common type of stroke.
Stroke occurs when a piece of clot breaks loose and is carried by the blood stream to the brain.
As it travels into smaller vessels, it reaches a point where it can no longer travel and blocks the vessel, cutting off the blood supply. Hemorrhagic stroke occurs when a blood vessel in the brain ruptures, spilling blood into the brain or area surrounding the brain. When this occurs, the cells that are nourished by the ruptured vessel fail to get their normal oxygen supply and cease to function properly. In addition to certain signs that indicate you are at risk for stroke, there are certain symptoms that may indicate impending stroke. Symptoms of TIAs occur rapidly and last a relatively short time.