Blood clots are a serious public health problem that kills hundreds of thousands of adults each year of which the majority of cases are preventable. In the U.S. over 250,000 people die each year from blood clot conditions. DVT is formed when blood thickens and clumps together, then travels and causes complications, such as a stroke. Thrombosis is the term for the condition that occurs when a blood clot (called a thrombus) forms in an artery or vein. Deep Vein Thrombosis or DVT, a potentially deadly condition, is the kind of thrombosis caused when a blood clot develops in a large vein, often in the lower leg, thigh or pelvis.