Pulmonary embolism (PE) is a common and potentially lethal condition in the emergency department requiring early and accurate management.~The short-term mortality rate of PE varies widely and ranges from less than 2% in many patients with non massive PE to more than 95% in patients who experience cardiorespiratory arrest.~Although several prognostic models of acute PE are currently used, all of them have practical limitations.~Of all clinical scores integrating PE severity and comorbidity, the Pulmonary Embolism Severity Index (PESI) and its simplified version,(sPESI) have been most extensively validated to date.~However, current prognostic scores for pulmonary embolism (PE) are partly based on patients without PE confirmation via computed tomographic pulmonary angiography (CTPA), involving subjective parameters and complicated scoring methods [8].~Therefore, an objective, accurate, and simple prognostic model in CTPA-confirmed patients to predict the risk of 30-day mortality. help clinicians assess patients' risks and improve therapeutic decision-making that is called PERFORM score (pulmonary embolism risk score for mortality)
Assess performance of PERFORM score in predicting outcome in CTPA confirmed patients.~Compare PERFORM score with the currently validated PESI in risk stratification of patients