Systemic hemodynamic response to aortic crossclamping. Preload does not necessarily increase. If during infrarenal aortic crossclamping blood volume shifts into the splanchnic vasculature, preload does not increase.
AoX: aortic crossclamping; Ao: aortic; R art: arterial resistance; CO: cardiac output; ↑: increase; ↓: decrease. * Different patterns are possible.