Acute pulmonary embolism (PE) is a fairly common condition that affects 1-2/1000 individuals in the US per year. Patients with massive PE (defined by hemodynamic compromise) have high mortality and these patients benefit from aggressive treatments such as thrombolysis, surgical thrombectomy and catheter-based interventions. However, which modality is superior is not known. The PERT (Pulmonary Embolism Response Team) Registry consists of data obtained from patients admitted to the hospital with PE for whom the PERT team has been consulted. Intially begun at Massachusetts General Hospital, Michigan Medicine was invited in 2018 to collaborate in this multi-center registry. The PERT Registry Leaders hope to advance the understanding of practices used and outcomes of specific PE treatment by using epidemiologic, therapeutic, quality assessment and outcomes research.