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◎ Medicine & Health·2 min·Updated Mar 15, 2026

What is Pulmonary Embolism?

Pulmonary Embolism

Quick Answer

A pulmonary embolism is a blockage in one of the pulmonary arteries in the lungs, usually caused by blood clots that travel to the lungs from the legs or other parts of the body. This condition can be life-threatening and requires immediate medical attention.

Overview

Pulmonary embolism occurs when a blood clot, often formed in the legs, breaks loose and travels to the lungs, blocking blood flow. This blockage can prevent oxygen from reaching the lungs and, subsequently, the rest of the body, which can lead to serious complications. It is important to recognize the symptoms, such as shortness of breath and chest pain, as they can indicate a medical emergency. The condition is often related to deep vein thrombosis (DVT), where clots form in the deep veins of the legs. For example, someone who has had surgery or is immobile for a long time may develop DVT, which can lead to a pulmonary embolism if the clot dislodges. Understanding the connection between these conditions emphasizes the need for prevention and treatment strategies, especially for at-risk individuals. Pulmonary embolism matters because it can be fatal if not treated promptly. The risk factors include prolonged immobility, certain medical conditions, and lifestyle choices like smoking. Awareness and education about this condition can save lives, as early detection and treatment are crucial.

Frequently Asked Questions

Common symptoms include sudden shortness of breath, chest pain that may worsen with deep breaths, and coughing up blood. Some people may also experience rapid heart rate or lightheadedness.
Doctors typically use imaging tests like a CT scan or a ventilation-perfusion (V/Q) scan to diagnose pulmonary embolism. Blood tests may also be done to check for clotting issues.
Treatment often involves anticoagulant medications to thin the blood and prevent further clotting. In severe cases, more aggressive treatments like thrombolytics or surgery may be necessary to remove the clot.