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. 2024 Mar 8;42(5):928–932. doi: 10.1097/HJH.0000000000003669

FIGURE 2.

FIGURE 2

(a) First HUTT performed showing marked increase in SBP (in black) during orthostatism reaching more than 250 mmHg at the moment of standing-up (1) and maintaining an average of 180 mmHg (2) during orthostatism. There is also an increase in heart rate (HR) (in red) at the moment of standing-up (3) reaching almost 150 bpm and maintaining an average of 120 bpm during orthostatism (4). Both SBP and HR decreases when the patient changes to supine position (5). (b) Comparison between the pretreatment HUTT (in black) and the posttreatment HUTT (in green), performed 2 weeks after initiation of antihistamine. There is no increase at the moment of standing-up in the post-Tx HUTT (1) compared with the increase in the pre-Tx HUTT (2). During orthostatism, SBP maintains around 90–100 mmHg (3), compared with the increase showed in the pre-Tx HUTT (4). (c) Comparison between the changes in SBP during the Valsalva maneuver, showing significant reduction in SBP during the phase II-early and diminished overshoot in the phase IV in the post-Tx (in red) compared with the pre-Tx (in black) phase II-early and the overshoot in the phase IV.