Blood clots are the most common source of pulmonary embolus.

Name: Blood clots are the most common source of pulmonary embolus.
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Blood clots, also known as deep vein thrombosis (DVT), are the most common source of pulmonary embolus. When a clot from the veins in the legs or pelvis dislodges and travels to the lungs, it can cause a blockage in the pulmonary artery, which can be life-threatening. Other less common causes of pulmonary embolism include air bubbles, fat emboli, and tumor cells.

Blood Clots Are the Most Common Source of Pulmonary Embolus