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. 2019 Nov 30;87(6):1025–1032. doi: 10.1038/s41390-019-0697-9

Fig. 3. Cerebral blood flow velocities in the anterior cerebral artery.

Fig. 3

Median values with ranges are shown for systolic peak flow velocity (Vs), end diastolic peak flow velocity (Vd), resistance index (RI), and pulsatility index (PI) of the anterior cerebral artery in the three epochs of the study. RI and PI were calculated using the following formulas: RI = (Vs − Vd)/Vs and PI = (Vs − Vd)/mean velocity. We could not find differences in CBFV values when comparing the three epochs of the study. See the text for details.