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Any blood clot forms due to an imbalance between coagulation (the formation of the insoluble blood protein fibrin) and fibrinolysis. The three major mechanisms for such an imbalance are enumerated in Virchow's triad: alterations in normal blood flow, injury to the blood vessel wall, and alterations in the constitution of blood (hypercoagulability).
After the tear, blood enters the arterial wall and forms a blood clot, thickening the artery wall and often impeding blood flow. The symptoms of vertebral artery dissection include head and neck pain and intermittent or permanent stroke symptoms such as difficulty speaking, impaired coordination, and visual loss.
The carotid arteries are major blood vessels in the neck that branch into smaller vessels called the external and internal carotid arteries. [3] In carotid artery dissection, a tear in the arterial wall allows blood to flow between the layers of the artery, leading to potential narrowing, reduced blood flow, or clot formation, which may cause a ...
Different types of blood clots bring different kinds of symptoms. Doctors explain what you might experience if you have a blood clot. What a Blood Clot Feels Like, According to Doctors
There are typically few noticeable symptoms until the situation becomes dire and you experience catastrophic complications such as a heart attack, stroke, or blood clot.
Blood clots have been reported in a small minority of people after receiving COVID-19 vaccines by AstraZeneca and Johnson & Johnson.
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