Pulmonary embolism. Light micrograph showing a blood clot (round, dark pink) completely blocking the lumen (inner space) of the pulmonary artery in th
Pulmonary embolism. Light micrograph showing a blood clot (round, dark pink) completely blocking the lumen (inner space) of the pulmonary artery in the lung. This is known as a pulmonary embolism (PE) and is caused when a fragment of a thrombus (blood clot) elsewhere in the circulatory system, breaks off and travels in the blood to the arteries in the lungs. It most commonly occurs as a complication of deep vein thrombosis (DVT) and can cause shortness of breath and even lead to sudden death.
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