A pulmonary embolism is a blood clot in the lung that occurs when a clot in another part of the body (often the leg or arm) moves.When clotting is excessive, small blood vessels in critical places can become clogged with clots.They change shape from round to spiny, stick to the broken vessel wall and each other, and begin to plug the break.Polycythemia vera is a disorder of the blood-producing cells of the bone marrow.The causes of blood clots can vary, so you have to be careful.
Pieces of clots from veins in the legs, pelvis, or abdomen can travel through the bloodstream to the lungs and block major arteries there (pulmonary embolism).It is a good thing when your body is trying to stop blood loss, however.About Awards Membership ASH Foundation Global Initiatives Newsroom.Patient Groups A list of Web links to patient groups and other organizations that provide information.
Surprisingly, heparin, a drug given to reduce the risk of clot formation, sometimes has an unintended activating effect on platelets that increases the risk of clotting ( heparin -induced thrombocytopenia).Clotting that occurs in arteries is usually associated with atherosclerosis (hardening of the arteries), a deposit of plaque that narrows the inside of the vessel.
Even certain medications can affect how quickly your blood clots.Sometimes, however, clots form on the inside of vessels without an obvious injury or do not dissolve naturally.
There are molecules in your system that signal your body to let it know when, where, and how quickly to form a clot, and genetics plays a role in how quickly your body reacts to these signals.
As platelets accumulate at the site, they form a mesh that plugs the injury.
A blood clot is a blockage of a healthy vessel that can lead to a variety of problematic situations.The main target from urgent medicine in such scenarios is actually to dissolve the blood clot and.