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Scatter plots of pooled individual data and simple linear regression of percentage changes of the internal carotid artery (ICA) diameter and the reciprocal of cross-sectional area (CSA−1) of ICA from the baseline during steady-state changes in mean arterial pressure (ΔMAP%). The solid lines represent regression slopes and the dotted lines represent 95% confidence intervals. These relationships were not influenced by changes in end-tidal CO2 (see text).
