Trump diagnosed with chronic venous insufficiency after swelling in hands, legs. What is CVI and is it life-threatening?

The White House announced on Thursday that President Donald Trump has been diagnosed with chronic venous insufficiency (CVI). The announcement followed growing public speculation over visible swelling in the president's legs and bruises on his hands. The 79-year-old Republican has faced intensifying scrutiny over his age and cognitive fitness and has often criticized former President Joe Biden over concerns about his health during last year's presidential election.