Patients with massive PE should receive thrombolytics when no major contraindications to therapy exist. Patients with submassive PE at highest risk for progression to hemodynamic instability should receive anticoagulation and be monitored for clinical deterioration. If an imminent risk of hemodynamic instability or cardiac arrest occurs, thrombolytics should be administered if no contraindications exist. Net mortality benefit and risk of bleeding must be considered when deciding to administer thrombolytic therapy in massive or submassive PE.
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