Figure 1
From: Haemodynamic study of left nonthrombotic iliac vein lesions: a preliminary report
Pressure of the bilateral iliac veins and inferior vena cava (IVC) in 24 subjects. The pressure at the caudal end of the stenotic segment of the left common iliac vein (LCIV) gradually increases with increasing clinical classification, with the most substantial increase observed in Group C subjects (red area). Conversely, the pressure at the cranial end of the stenotic segment of the LCIV significantly decreases, even dropping below the pressure level at the IVC (blue area), with increasing clinical classification. A1-A8: Group A, control group (C0a); B1-B8: Group B, mild group (C0s and C1-2); C1-C8: Group C, moderate to severe group (C3-6).
