Multicenter Study to Evaluate a Severity Score Using Venous MRI and CT in Patients With Post-Phlebitic Syndrome

Endovascular management of post-thrombotic syndrome (PTS) has created new opportunities for patients and interventional radiologists. PTS is the most chronic complication of deep vein thrombosis (DVT), occurring in 20% to 40% of patients despite optimal anticoagulant therapy within the first 1 to 2 years after a lower limb DVT. PTS is characterized by various symptoms lasting more than 6 months after a DVT, including mild pain or swelling, venous claudication, heaviness/fatigue, chronic pain or cramps, venous ulcers, edema, skin discoloration, and venous ectasia. Severe PTS negatively impacts quality of life. Several clinical tools or scales, such as the Villalta scale and CIVIQ-20, are used to diagnose and define PTS. Endovascular treatment of symptomatic chronic iliofemoral vein occlusions has shown good technical and clinical efficacy, with significant clinical benefits and improvements in the Villalta and CIVIQ scores. Proper planning of the recanalization procedure is essential, using CT and MRI imaging to analyze the venous anatomy in the pelvis, abdomen, and lower limbs. The CT is the reference examination for chronic lower limb thrombosis, performed using the Baldt technique to opacify the deep venous network and detect endoluminal adhesions. However, there are risks such as failure to puncture the veins on the back of the foot, pain during puncture, and flow artifacts. MRI is less commonly used due to its availability and long examination times, but its results are promising. The literature on chronic lower limb thrombosis is limited, with no consensus on lesion descriptions, highlighting the need for a descriptive lesion score