What is a pulmonary embolism?

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Multiple Choice

What is a pulmonary embolism?

Pulmonary embolism occurs when a blood clot travels through the veins, reaches the heart, and lodges in the arteries of the lungs, blocking blood flow to part of the lung. This clot usually starts as a deep vein thrombosis in the legs or pelvis and breaks loose to travel to the lungs. That direct action—clots ending up in the lungs—best captures what a pulmonary embolism is and why it’s dangerous, since the blockage disrupts oxygenation and can be life-threatening. Other scenarios describe different problems: a clot in the systemic arteries of the leg would cause limb ischemia, not a pulmonary issue; buildup of plaque in coronary arteries is atherosclerosis, not an embolus; an air bubble in the venous system is an air embolism, a separate mechanism from a thrombotic pulmonary embolism.

Pulmonary embolism occurs when a blood clot travels through the veins, reaches the heart, and lodges in the arteries of the lungs, blocking blood flow to part of the lung. This clot usually starts as a deep vein thrombosis in the legs or pelvis and breaks loose to travel to the lungs. That direct action—clots ending up in the lungs—best captures what a pulmonary embolism is and why it’s dangerous, since the blockage disrupts oxygenation and can be life-threatening.

Other scenarios describe different problems: a clot in the systemic arteries of the leg would cause limb ischemia, not a pulmonary issue; buildup of plaque in coronary arteries is atherosclerosis, not an embolus; an air bubble in the venous system is an air embolism, a separate mechanism from a thrombotic pulmonary embolism.

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