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

The objectives of the PROTECT study are: * To assess the role of CT pulmonary angiography in the risk stratification of hemodynamically stable patients with acute symptomatic pulmonary embolism (PE). * To assess the role of transthoracic echocardiography in the risk stratification of hemodynamically stable patients with acute symptomatic PE. * To assess the role of 2 biomarkers (troponin and brain natriuretic peptide) in the risk stratification of hemodynamically stable patients with acute symptomatic PE. * To assess the role of the Pulmonary Embolism Severity Index (PESI) in the risk stratification of hemodynamically stable patients with acute symptomatic PE. * To assess the combined role of CT pulmonary angiography, transthoracic echocardiography, PESI, troponin I and brain natriuretic peptide in the risk stratification of hemodynamically stable patients with acute symptomatic PE.