In the emergency department, how should suspected pulmonary embolism be evaluated and anticoagulated?

• A. Use Wells or PERC scoring; obtain CTA chest if indicated; start anticoagulation (heparin or LMWH) if PE is suspected or confirmed; provide supplemental oxygen.
• B. Rely solely on chest X-ray to rule out PE and withhold anticoagulation until CTA confirms.
• C. Treat with antibiotics and intravenous fluids; imaging is unnecessary if the patient is tachycardic.
• D. Only observe in the ED and discharge if the patient is not in shock.

Answer: (A)