Fig. 1

63-year-old woman presenting with acute left lower extremity swelling and pain. A Coronal contrast-enhanced CT demonstrates acute, completely occlusive thrombus extending from the proximal left common iliac vein (blue arrow) through the common femoral vein. B Axial contrast-enhanced CT at the level of the proximal left common iliac vein demonstrates fat-stranding (blue arrow) and expansile thrombus, suggestive of acute deep venous thrombosis. C Intra-vascular ultrasound of the left common iliac vein (blue arrow) demonstrates completely occlusive thrombus and marked luminal narrowing secondary to compression from the crossing right common iliac artery (red arrow), compatible with a May-Thurner compression lesion. D Pre-intervention IVUS of the left common iliac vein demonstrates completely occlusive, expansile acute thrombus. E Venography of the left iliofemoral veins demonstrate multiple filling defects compatible with acute thrombus. F Venography following treatment with the ZelanteDVT system demonstrates technically successful thrombectomy with no residual thrombus. G Completion venography following stent placement demonstrates resolution of the compressive lesion at the left common iliac vein and brisk in-line venous flow through the iliofemoral veins without evidence of residual thrombus. H Completion IVUS following stent placement demonstrates complete restoration of luminal size without residual thrombus or narrowing