Fig. 2
Percent CBF reduction at end-tilt compared to supine and the different degrees of deconditioning, as expressed in the different percentages peak VO2, in ME/CFS patients with normHRBP, POTS, and dOH. CBF: cerebral blood flow in ml/min; ME/CFS: myalgic encephalomyelitis/chronic fatigue syndrome patients; NormHRBP: normal heart rate and blood pressure response; dOH: delayed orthostatic hypotension; POTS: postural orthostatic tachycardia syndrome; percent VO2: oxygen consumption as percentage of normal values of a population study [19]