A blood clot that lodges in the arteries of the lungs can turn a routine recovery into a life-threatening emergency within minutes. Pulmonary embolism, the condition caused when clots that typically form in the deep veins of the legs break free and travel to the lungs, ranks as the third most common cardiovascular killer in the United States, behind only heart attack and stroke. Once a large clot blocks the pulmonary arteries, oxygen exchange is…
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