A semi-automatic computerized method to measure baroreflex- mediated heart rate responses that reduces interobserver variability. P.P.S. Soares, M.R. Ushizima, E.M. Krieger and M.C.C. Irigoyen. Brazilian Journal of Medical and Biological Research, 38 (6): 949, 2005.
Figure 3. Regression analysis (left panels) and Bland and Altman plots (right panels) for reflex bradycardia indexes after phenylephrine bolus infusions (A) and for reflex tachycardia indexes after sodium nitroprusside bolus infusions (B). The average values from the PRM and TDM are presented on the abscissa and the ordinates show the differences between the two methods against a mean difference (Mean, middle horizontal line). Upper (+1.96 SD) and lower (-1.96 SD) limits of agreement are shown as horizontal lines. Circles represent the differences between methods subtracted from a mean (Mean) difference. PRM = proposed method; TDM = traditional method.