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.
A pulmonary embolism is a part of a blood clot that travels to the lungs. The most common cause of a pulmonary embolism is a blood clot (thrombus) in a large leg vein of the leg that breaks off and travels to the lungs (embolus). An embolus may be from clots in other parts of the body. Or they may be made up of other solids, liquids, or gases that travel to the lungs.