Stroke
            
             Background:
             Stroke is the 3rd leading cause of death in the United States today, following cardiovascular disease and cancer. It is also the leading cause of disability in this area as well. There are four types of strokes: cerebral embolism, cerebral thrombosis, cerebral hemorrhage, and subarachnoid hemorrhage.
             Causes:
             A clot in the blood vessel carrying blood to the brain causes stroke. Another name for this is an embolism. It can be caused by a thrombus or another particle. As a result, part of the brain doesn't get enough oxygen. Nerve cells are unable to work, and die. This causes the part of the body controlled by that side of the brain to not function properly. It causes permanent damage because those brain cells can't be replaced. This is the reason why many are paralyzed for life.
             Symptoms:
             Stroke can occur without any warning. However, a headache may arise, especially in the case of both kinds of hemorrhages. Symptoms are also based on which part of the brain is affected by the blood clot. In every person, symptoms vary because the brain differs between every person. Other symptoms that may occur before a stroke are numbness, loss of sight in one or both eyes, and dizziness.
             Results:
             After a stroke, a variety of outcomes can occur. It all depends on how quickly the person is taken care of and how quickly the clot is removed. Some results can be minor such as only paralysis of only one part of one's body. However, it could be a lot more serious such as paralysis of one whole side of the body, and even death. Therefore, the quicker someone receives emergency help, the lesser permanent damage he will acquire. But, patients will be able to recover partially as other parts of the brain take over the damaged parts.
             Risk Factors:
             There are many risk factors that can increase the risk of stroke in any person. Some of these factors are hypertension and smoking. Hypertension, however, is a major ...