<unk>  has been linked to a variety of diseases or abnormalities. Individuals with sickle cell anemia, compressed blood vessels, ventricular tachycardia, plaque buildup in the arteries, blood clots, extremely low blood pressure as a result of heart attack, and congenital heart defects have a higher predisposition to<unk>  in comparison their healthy counterparts.Sickle cell anemia may cause<unk>  associated with the irregularly shaped blood cells. Sickle shaped blood cells clot more easily than normal blood cells, impeding blood flow to the<unk> . Compression of blood vessels may also lead to<unk> , by blocking the arteries that carry oxygen to the<unk> . Tumors are one cause of blood vessel compression. Ventricular tachycardia represents a series of irregular heartbeats that may cause the heart to completely shut down resulting in cessation of oxygen flow. Further, irregular heartbeats may result in formation of blood clots, thus leading to oxygen deprivation to all organs. Blockage of arteries due to plaque buildup may also result in<unk> . Even a small amount of plaque build up can result in the narrowing of passageways, causing that area to become more prone to blood clots. Large blood clots can also cause<unk>  by blocking blood flow. A heart attack can also cause<unk>  due to the correlation that exists between heart attack and low blood pressure. Extremely low blood pressure usually represents the inadequate oxygenation of tissues. Untreated heart attacks may slow blood flow enough that blood may start to clot and prevent the flow of blood to the<unk>  or other major organs. Extremely low blood pressure can also result from drug overdose and reactions to drugs. Therefore,<unk>  can result from events other than heart attacks. Congenital heart defects may also cause<unk>  due to the lack of appropriate artery formation and connection. People with congenital heart defects may also be prone to blood clots. Other events that may result in<unk>  include cardiorespiratory arrest, stroke, and severe irreversible<unk>  damage. Recently, Moyamoya disease has also been identified as a potential cause for<unk> . Moyamoya disease is an extremely rare cerebrovascular condition that limits blood circulation to the<unk> , consequently leading to oxygen deprivation.
Brain ischemia
Cerebral infarction
Cerebral edema
Stroke
Brain herniation
Intracranial hemorrhage
Heat stroke
Intracerebral hemorrhage