<P> Traumatic injury to an extremity may produce partial or total occlusion of a vessel from compression, shearing, or laceration . Acute arterial occlusion may develop as a result of arterial dissection in the carotid artery or aorta or as a result of iatrogenic arterial injury (e.g., after angiography). </P> <P> An inadequate flow of blood to a part of the body may be caused by any of the following: </P> <Ul> <Li> Thoracic outlet syndrome (compression of the brachial plexus) </Li> <Li> Atherosclerosis (lipid - laden plaques obstructing the lumen of arteries) </Li> <Li> Hypoglycemia (lower than normal level of glucose) </Li> <Li> Tachycardia (abnormally rapid beating of the heart) </Li> <Li> Radiotherapy </Li> <Li> Hypotension (low blood pressure, e.g. in septic shock, heart failure) </Li> <Li> Outside compression of a blood vessel, e.g. by a tumor or in the case of superior mesenteric artery syndrome </Li> <Li> Sickle cell disease (abnormally shaped red blood cells) </Li> <Li> Induced g - forces which restrict the blood flow and force the blood to the extremities of the body, as in acrobatics and military flying </Li> <Li> Localized extreme cold, such as by frostbite or improper cold compression therapy </Li> <Li> Tourniquet application </Li> <Li> An increased level of glutamate receptor stimulation </Li> <Li> Arteriovenous malformations, and peripheral artery occlusive disease </Li> <Li> rupture of significant blood vessels supplying a tissue or organ . </Li> <Li> Anemia vasoconstricts the periphery so that red blood cells can work internally on vital organs such as the heart, brain, etc., thus causing lack of oxygen to the periphery . </Li> <Li> Premature discontinuation of any oral anticoagulant . </Li> <Li> Unconsciousness, such as due to the ingestion of excessive doses of central depressants like alcohol or opioids, can result in ischemia of the extremities due to unusual body positions that prevent normal circulation </Li> </Ul> <Li> Thoracic outlet syndrome (compression of the brachial plexus) </Li>

Death of an area of cardiac tissue due to an interrupted blood supply is called