Clinical Research Directory

Inclusion Criteria: * Patients with thrombotic left iliac vein compression syndrome who underwent left iliac vein stent implantation Exclusion Criteria: * Age \< 18 years or age \> 75 years * With history of pelvic surgery, left iliac vein trauma and pelvic radiotherapy * With obvious contraindications for anticoagulation therapy * Allergic to iodine contrast agents in the past * With concomitant diseases that need high-intensity anticoagulation, and the anticoagulation intensity is clearly higher than that of the patients with iliac vein therapy alone * Active bleeding or potential bleeding risk * Pregnant or breastfeeding women * With pelvic tumors causing compression of left iliac vein, * With chronic venous insufficiency of lower extremities caused by K-T syndrome * With malignant tumors and life expectancy \< 1 year * Taking cytochrome P450 3A4(CYP-450 3A4) inhibitors or inducers