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. 2013 Feb 6;22(1):23–30. doi: 10.1055/s-0033-1334092

Fig. 3.

Fig. 3

Simultaneous recordings of the factual pressure in the posterior tibial vein (upper curve) and great saphenous vein (lower curve) in a patient with severe chronic venous insufficiency. After interruption of saphenous reflux, physiological decrease in pressure was recorded both in posterior tibial and in great saphenous vein during calf pump activity; slow return to the starting level during the following recovery period. Both curves are nearly identical demonstrating pressure behavior typical of conjoined vessels.