European Society of Cardiology (ESC) algorithm for diagnostic workup and management of suspected pulmonary embolism during pregnancy and up to 6 weeks postpartum. 2019 ESC Guidelines for the diagnosis and management of acute pulmonary embolism developed in collaboration with the European Respiratory Society (ERS). https://doi.org/10.1093/eurheartj/ehz405. (a) If chest X-ray is abnormal, consider also alternative cause of chest symptoms. (b) DVT in pelvic veins may not be ruled out by CUS. If the entire leg is swollen, or there is buttock pain or other symptoms suggestive of pelvic thrombosis, consider magnetic resonance venography to rule out DVT. (c) CTPA technique must ensure very low fetal radiation exposure (see Table 1). (d) Perform full blood count (to measure hemoglobin and platelet count) and calculate creatinine clearance before administration. Assess bleeding risk and ensure absence of contraindications. (e) See Konstantinides and Meyer.²  High, intermediate, and low PE pretest probability as defined in Konstantinides and Meyer.²  CTPA, computed tomography pulmonary angiography; CUS, compression ultrasonography; PE, pulmonary embolism. Reproduced with permission from Konstantinides and Meyer.²