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. Author manuscript; available in PMC: 2017 Jan 19.
Published in final edited form as: J Am Coll Cardiol. 2016 Jan 19;67(2):174–189. doi: 10.1016/j.jacc.2015.10.072

FIGURE 2. Metabolite-ΔPQ Relationship.

FIGURE 2

The highest quartile of indoleamine 2,3-dioxygenase (IDO) tryptophan metabolite (TM) score exhibited a much greater ΔPQ during exercise than the lower quartiles. ΔPQ data = median ± interquartile range of change in mean pulmonary arterial pressure relative to change in cardiac output.