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A, Healthy control cohort 95% confidence limit upper threshold identification. B, Algorithmic classification approach in BREATH (Breathlessness Revealed Using Exercise to Assess the Hemodynamic Response) cohort. CO indicates cardiac output; mPAP, mean pulmonary artery pressure; PAH, pulmonary arterial hypertension; PH‐LHD, pulmonary hypertension due to left heart disease; and PP/PAWP, pulse pressure/pulmonary artery wedge pressure.
