This study is an observational, prospective study examining the role point-of-care echocardiography of predicting short term adverse outcomes in emergency department patients with acute pulmonary embolism. The primary objective is to assess the diagnostic performance of ultrasound-guided measures of right ventricular dilation (RVD) and strain in predicting clinical outcomes in acute PE. The secondary objective is to investigate the utility of combining ultrasound-guided measures of RVD and the pulmonary embolism severity index (PESI) score in predicting adverse outcomes in acute PE.