A pulmonary embolism is

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A pulmonary embolism is a blockage in one of the pulmonary arteries in the lungs, usually caused by a blood clot that travels from elsewhere in the body. It is considered life-threatening because it can prevent blood and oxygen from reaching the lung tissue, leading to serious complications such as heart failure or even sudden death. Although treatable, it requires immediate medical attention and can require invasive procedures, such as clot-dissolving medication or surgery. It is not a chronic condition, as it is typically a one-time event.

A Pulmonary Embolism Is