what is Deep vein thrombosis (DVT) is a condition in which a blood clot develops in one of the primary veins of the pelvis, thigh, or calf, or less frequently the arms, abdomen, and chest.

When a clot forms, it can extend to adjacent areas of the vein, triggering a localized inflammation that may encourage additional blood clot growth.

A clot in a deep vein can also increase the potential for a dangerous complication, pulmonary embolism, in which a clot breaks free, travels through the bloodstream, and lodges in the lungs, where it can cause heart and lung collapse.

Lower extremity deep venous disease is the third most commoncardiovascular disease and is associated with significant individual morbidity and high societal cost.