Also known as: Pulmonary Embolism (PE)
A pulmonary embolism is a blood clot that travels to the lungs, blocking one or more pulmonary arteries. It is a serious, potentially life-threatening condition that requires immediate medical attention.
Pulmonary embolism is the third most common cardiovascular cause of death after heart attack and stroke, affecting an estimated 1 in 1,000 people annually. Most pulmonary emboli originate from deep vein thrombosis (DVT) in the legs.
When a blood clot breaks free and travels to the lungs, it blocks blood flow through the pulmonary arteries. This reduces oxygen exchange and increases pressure on the right side of the heart. The severity depends on the size and number of clots and the patient's underlying health.
Prompt diagnosis and treatment with anticoagulation significantly reduces mortality. Without treatment, PE has a mortality rate of approximately 30%; with treatment, this drops to 2–8%.
People with Pulmonary Embolism often experience the following symptoms.
Sudden, unexplained shortness of breath that may occur at rest. This is the most common symptom and often the most striking.
Sharp, stabbing chest pain that worsens with deep breathing, coughing, or movement. Caused by inflammation of the lung lining.
Heart rate increases as the heart works harder to compensate for reduced oxygen delivery and increased pulmonary pressure.
Coughing up blood or blood-streaked sputum occurs in a minority of patients and indicates pulmonary infarction.
Certain factors may increase your likelihood of developing Pulmonary Embolism.
Common approaches to managing pulmonary embolism. Always consult a healthcare provider for personalized treatment.
Blood thinners (heparin followed by warfarin or direct oral anticoagulants) are the mainstay treatment, preventing clot growth and recurrence.
Clot-dissolving medications (tPA) are used for massive PE with hemodynamic instability — rapid dissolution of the clot to restore blood flow.
An inferior vena cava filter may be placed to catch clots before they reach the lungs when anticoagulation is contraindicated.
Interventional procedures to mechanically break up or remove large clots in submassive or massive PE.
CT pulmonary angiography (CTPA) is the gold standard imaging study. D-dimer blood test is useful for ruling out PE in low-risk patients. ECG, chest X-ray, and echocardiography provide supportive information. Risk scoring (Wells criteria, PERC rule) guides the diagnostic workup.
Call emergency services immediately if you experience sudden, unexplained shortness of breath, sharp chest pain, rapid heart rate, or coughing up blood. Pulmonary embolism is a medical emergency.
Steps that may help reduce the risk of developing or worsening pulmonary embolism.
Early mobilisation after surgery
Compression stockings for immobilised patients
Prophylactic anticoagulation for high-risk hospitalised patients
Stay hydrated and move during long flights or car trips
If left untreated or poorly managed, pulmonary embolism may lead to:
Yes, small pulmonary emboli may cause only mild symptoms or even go unnoticed. However, any PE can potentially become life-threatening, and even small clots may indicate a larger underlying risk.
Typically at least 3–6 months for a provoked PE (clear trigger like surgery). For unprovoked PE or recurrent events, indefinite anticoagulation may be recommended.
Yes, although risk increases with age. Oral contraceptives, pregnancy, long flights, and genetic clotting disorders are risk factors that affect younger individuals.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.