Respiratory changes in biometry of suprarenal inferior vena cava in patients with varicose veins of lower extremities.

Clinical presentation of varicose veins is associated with different respiratory biometry of suprarenal inferior vena cava. C6 clinical class in comparison with C2 clinical class is associated with lower central venous compliance possible due to the narrowing of inferior vena cava. Smaller inferior vena cava diameters and higher collapsibility index in recurrent subgroup in comparison with previously untreated can be a sign of the significantly altered pressure gradient between the systemic capillaries and the right heart and impaired peripheral venous return. Narrowing of inferior vena cava with age can be a sign of more profound changes in systemic venous return with age in patients with varicose veins in comparison to those without chronic venous disease.