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Endovascular Therapy for Post-Thrombotic Syndrome - A Randomized Trial.
Suresh Vedantham1, Susan R Kahn2, William A Marston3
1Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis.
The New England Journal of Medicine
|April 13, 2026
Summary
Endovascular therapy significantly reduced post-thrombotic syndrome severity and improved quality of life in patients with iliac vein obstruction. However, this approach also increased the risk of bleeding compared to standard care.
Area of Science:
- Vascular Medicine
- Interventional Cardiology
- Clinical Trials
Background:
- Post-thrombotic syndrome (PTS) frequently follows deep-vein thrombosis (DVT), causing debilitating limb symptoms and reduced quality of life.
- Endovascular therapy offers a potential solution by addressing chronic venous obstruction, hypothesized to alleviate PTS severity.
Purpose of the Study:
- To evaluate the efficacy of endovascular therapy in reducing PTS severity and improving quality of life in patients with iliac vein obstruction.
- To compare outcomes of endovascular therapy plus standard care versus standard care alone for moderate to severe PTS.
Main Methods:
- A randomized trial involving 225 patients with moderate-to-severe PTS and iliac vein obstruction.
- Intervention group received endovascular therapy (stenting, antithrombotic therapy) plus standard care; control group received standard care alone.
- Primary outcome: PTS severity assessed by Venous Clinical Severity Score (VCSS) at 6 months; secondary outcomes included quality of life measures.
Main Results:
- Endovascular therapy group showed significantly lower VCSS scores at 6 months (mean difference -2.0, P=0.001).
- Improved venous disease-specific and overall quality of life were observed in the endovascular therapy group (P<0.001 for both).
- Higher incidence of bleeding was reported in the endovascular therapy group (11.6% vs. 3.6%, P=0.03).
Conclusions:
- Endovascular therapy is effective in reducing PTS severity and enhancing quality of life in patients with iliac vein obstruction over 6 months.
- The benefits of endovascular therapy are accompanied by an increased risk of bleeding.
- Findings support endovascular therapy as a treatment option for selected PTS patients, warranting careful risk-benefit assessment.
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