Clinical Research Directory

Inclusion Criteria: * Adult patients with acute symptomatic pulmonary embolism objectively diagnosed by imaging (with or without deep vein thrombosis) who have completed anticoagulation for the acute phase and have entered the maintenance phase of anticoagulation * Expected lifespan greater than 3 months * Eligible for the use of Xa factor inhibitors; * Agreement to participate in the study, signing of informed consent, and commitment to regular follow-up. Exclusion Criteria: * Moderate or severe liver dysfunction (Child-Pugh grade B or C); * Severe renal impairment (CrCl \< 15 ml/min); * Pregnant or breastfeeding women; * Tendency for spontaneous bleeding, such as coagulopathy or thrombocytopenia (PLT \< 20×10\^9/L); * Contraindications for the use of other Xa factor inhibitors; * Patients diagnosed with hereditary thrombophilia and antiphospholipid syndrome.