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. 2016 Jan 13;149(5):1252–1260. doi: 10.1016/j.chest.2015.11.015

Figure 3.

Figure 3

A and B, Representative Valsalva maneuver tracings. Continuous BP tracings of an (A) HC subject and (B) a patient with PAH. Small arrow indicates phase 2 recovery; large arrowhead indicates phase 4 overshoot. There is a blunted phase 2 recovery of BP and no phase 4 overshoot with a prolonged PRT in panel B, a pattern that is commonly observed in patients with autonomic dysfunction. 3N = point at which Valsalva is released when BP is at its lowest. See Figure 1 and 2 legends for expansion of other abbreviations.