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Stroke is a serious condition of blood vessel disorder caused by the stop of blood supply to the brain. Brain cells with ceased oxygen supply from blood will die in millions per second. [ 14 ] Not only is it one of the major causes of death around the world, it is also the cause of permanent disability.
Thrombolysis is the injection of an enzyme into the veins to dissolve blood clots, and while this treatment has been proven effective against the life-threatening emergency clots of stroke and heart attacks, randomized controlled trials [139] [140] [141] have not established a net benefit in those with acute proximal DVT.
Venous thrombi are caused mainly by a combination of venous stasis and hypercoagulability—but to a lesser extent endothelial damage and activation. [7] The three factors of stasis, hypercoagulability, and alterations in the blood vessel wall represent Virchow's triad, and changes to the vessel wall are the least understood. [8]
Cerebral angiography may demonstrate smaller clots than CT or MRI, and obstructed veins may give the "corkscrew appearance". [3] This, however, requires puncture of the femoral artery with a sheath and advancing a thin tube through the blood vessels to the brain where radiocontrast is injected before X-ray images are obtained. It is therefore ...
The most common presentation of cerebrovascular disease is an ischemic stroke or mini-stroke and sometimes a hemorrhagic stroke. [2] Hypertension (high blood pressure) is the most important contributing risk factor for stroke and cerebrovascular diseases as it can change the structure of blood vessels and result in atherosclerosis . [ 5 ]
Stroke is a sudden onset neurological event due to problems with blood vessels of the brain. There are two major types: 80 to 85% are ischemic, which means a blood vessel is blocked and starves ...
It most commonly affects leg veins, such as the femoral vein. Three factors are important in the formation of a blood clot within a deep vein—these are: the rate of blood flow, the thickness of the blood and; qualities of the vessel wall. Classical signs of DVT include swelling, pain and redness of the affected area. [3]
Vasospasm refers to a condition in which an arterial spasm leads to vasoconstriction.This can lead to tissue ischemia (insufficient blood flow) and tissue death ().. Along with physical resistance, vasospasm is a main cause of ischemia.