UNDERSTANDING BLOOD CLOTS
A blood clot in one of the large veins, usually in a person’s leg or arm, is called deep vein thrombosis, or DVT. When a DVT forms, it can partially or completely block the flow of blood through the vein. If DVT is not treated, the clot can break off and travel to the lungs, causing a PE.
A blood clot in the lungs is called pulmonary embolism, or PE. This requires immediate medical attention because a PE can be deadly.