Fig. 6

Grey zone analysis. (a) ΔSVITrend, Stroke volume index variation induced by the Trendelenburg position; (b) FTcBaseline, baseline carotid artery corrected flow time; (c) ΔVpeakCA, respirophasic variation in carotid artery blood flow peak velocity; (d) PPV, pulse pressure variation; (e) SVV, stroke volume variation.