Figure 4.

Time trends (solid red line) and the 95% CI (dashed line) of (A,B) cerebral blood flow velocity (CBFV) and (C,D) baroreflex sensitivity (BRS) in patients (A,C) with and (B,D) without cerebral vasospasm (CV) analyzed in the days that follow aneurysmal subarachnoid hemorrhage (aSAH). The relationship between days and physiological parameters was calculated using multiple linear regression analyses with subjects treated as categorical factors using dummy variables (with respect to the intersubject variability) and a partial coefficient (R_p) between analyzed variables.