Prognostic Value of Computed Tomography (CT) Scan in Hemodynamically Stable Patients With Acute Symptomatic Pulmonary Embolism

Inclusion Criteria: * Acute symptomatic Pulmonary Embolism (PE) confirmed by: * CT pulmonary angiography positive for PE * Ventilation/ perfusion lung scan with high likelihood of PE (according to PIOPED criteria) * V/Q ventilation/ perfusion lung scan inconclusive for PE or negative CT pulmonary angiography in a patient with thoracic symptoms and a lower limb ultrasound showing a positive diagnosis for deep vein thrombosis. Exclusion Criteria: * Contraindication for CT pulmonary angiography (allergy to iodine contrasts or creatinin clearance \< 30 ml/min). * Informed consent not obtained. * Pregnancy. * Life expectancy of less than 3 months. * Hemodynamic unstability defined as SBP \< 90 mm Hg, need for cardiopulmonary reanimation, need for vasoactive drugs or orotracheal intubation. * Thrombectomy, insertion of filter in the cava vein, or need for fibrinolytic treatment for PE episode. * Participation in another clinical trial for treatment of PE.