https://iveinclinic.com/articles/what-is-chronic-venous-insufficiency-and-what-are-its-causes/
What Is Chronic Venous Insufficiency and What Are Its Causes? - iVein Clinic
Mar 28, 2026 - Chronic venous insufficiency (CVI) is a progressive condition where the veins in the legs cannot efficiently return blood to the heart. This occurs due
chronic venous insufficiencywhat is