Dr. Christopher Kabrhel discusses the PERC rule for evaluating patients with suspected pulmonary embolism and a trial exploring the effects of implementing the PERC rule in emergency departments in France, published in JAMA in February 2018. Dr. Nancy Sokol hosts. Dr. Kabrhel is Associate Professor at Harvard Medical School, an Emergency Medicine physician at Massachusetts General Hospital, and author of several topics on pulmonary embolism for UpToDate. Reference: Freund Y, Cachanado M, Aubry A, et al. Effect of the Pulmonary Embolism Rule-Out Criteria on Subsequent Thromboembolic Events Among Low-Risk Emergency Department Patients: The PROPER Randomized Clinical Trial. JAMA 2018; 319:559. Contributor Disclosure: Grant/Research Support: Siemens [Venous thromboembolism (D-dimer test)]; Janssen [Venous thromboembolism (Rivaroxaban)]; Diagnostica Stago [Venous thromboembolism (D-dimer test)]. Consultant/Advisory Board: Siemens [Venous thromboembolism (D-dimer test)]; Janssen [Venous thromboembolism (Rivaroxaban)].