Embolism

Partial or complete closure of a blood vessel by a plug (abnormal particle) transported in the blood stream. The plug may consist of a thrombus (blood clot). A piece of the clot breaking off and being carried to the lungs is one of the most dangerous complications of a deep vein thrombosis; this condition is called pulmonary embolism. If the blood clot suddenly blocks off a main pulmonary artery, the circulation in the lungs collapses and, in the worst case, the outcome may be fatal.
Treatment consists of medicinal products to thin the blood (anticoagulants).
The prevention of pulmonary embolism by preventing thrombosis is a medical priority. Prevention consists of exercise, anticoagulants, compression therapy, and the elimination of varicose veins.