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Low-frequency oscillation (LFO) intensities of mean arterial pressure (MAP), relative change in CBF (rCBF), Δ[HbO2] and Δ[Hb] in two subjects before, during and after head-up-tilting (HUT). A, A 68-years-old female subject with low-risk for developing CVD. B, A 84-years-old female subject with high-risk for developing CVD. CBF, cerebral blood flow; CVD, cerebrovascular disease; Hb, deoxy-hemoglobin concentration; HbO2, oxy-hemoglobin concentration
