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Blood clots are a set of sticky blood cells that thicken when a blood vessel is damaged. The body creates blood clots as an ordinary reaction to blood vessel damage. The primary job of the blood clot is to seal the flow in a damaged blood vessel.
When a blood clot forms in multiple arteries that supply blood to the heart, it obstructs the blood circulation to a part of the heart muscle, reducing or totally cutting off the oxygen supply to the cells in that region.
Existence of an obstructing blood clot is definitely referred to as thrombosis. Thrombophlebitis is an irritation of the vein in the region where a blood clot has formed. Superficial thrombophlebitis happens when a blood clot changes veins near the skin surface, or superficial veins.
Deep venous thrombosis happens when a blood clot changes deeper, larger veins, like those in the lower legs and thighs. These clots can break from a blood vessel and result in a pulmonary embolism if they go to the lungs.
Ischemic strokes can be caused by blood clots that have formed in the heart as a result of rhythm disorder known as atrial fibrillation and atrial flutter. The existence of man-made replacement heart valves may also lead to blood clot formation.
Some blood clots might form in a narrowed artery as a consequence of atherosclerosis, commonly known as hardening of the arteries.
Flow of blood in the veins depends upon contraction of surrounding muscles, and with inactivity, like extended bed rest, the blood begins to collect and blood clots may easily form.
In case of DVT, a blood clot in the leg can cause pain, swelling, redness and excessive heat. A blood clot that formed in deeper and larger veins, like those of the legs, stomach and pelvis, may break away and start to become a travelling blood clot, or embolus.