chronic venous insufficiency
… he was diagnosed with chronic venous insufficiency (CVI), a condition that occurs when leg vein valves fail, causing blood to pool in the legs.Erkki Forster

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“CVI.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/CVI. Accessed 7 Mar. 2026.

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