How is pulmonary embolism diagnosed?

Pulmonary embolism (PE) is a condition where one or more arteries in the lungs become blocked by a blood clot. Diagnosing PE can be challenging due to its symptoms often mimicking other conditions such as anxiety, pneumonia, or myocardial infarction. Clinicians typically begin with a thorough patient history and physical examination to assess symptoms like chest pain, shortness of breath, and risk factors such as recent surgery, prolonged immobility, or a history of deep vein thrombosis.

Medical guidelines often suggest initial evaluation with a D-dimer blood test, which measures clot presence in the body. Elevated D-dimer levels may warrant further imaging studies. The gold standard for diagnosing PE is a computed tomography pulmonary angiography (CTPA), which provides detailed images of the lung arteries. In some cases, a ventilation-perfusion (V/Q) scan may be used, especially if exposure to contrast dye is a concern.

Clinicians also consider patterns such as sudden onset of symptoms and their severity to guide the diagnostic process. Anyone with concerns about pulmonary embolism should discuss their specific situation with their healthcare provider.