Fig 3. Scheme of hepato-splanchinc contribution for hemodynamic stability.

Splanchnic vasoconstriction reduces arterial inflow (black arrows) thereby lowering downstream distending pressures and mobilizing blood volume (white arrows) sequestered in the compliant splanchnic vasculature. At the same time reduced portal vein flow draining form splanchnic vascular beds (purple) causes a compensatory increase (red arrow) in the separate hepatic arterial blood flow (red) because of compensatory vasodilation in Mall´s space.