See also: List of states and territories of the United States. This table includes abbreviations for three independent nations related to the United States through Compacts of Free Association, and other comparable postal abbreviations, including those now obsolete. Codes and abbreviations for U.S. states, territories and other regions.
Pulmonary embolism is the sudden blockage of a major blood vessel (artery) in the lung, usually by a blood clot . In most cases, the clots are small and are not deadly, but they can damage the lung. But if the clot is large and stops blood flow to the lung, it can be deadly.
What can cause blood clots in the lungs or legs? Dr. Jeffrey Kass Dr. Kass. 1 doctor agreed: Smoking: Smoking is one cause, varicose veins, swelling in the lower legs, trauma, being stagnant i.E sitting on a plane for a long trip., and oral contraceptives are the most common causes for the clot to go to the leg.