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Patients with an RVSP ≥35 mm Hg had significantly higher PA diameters (29.5 vs. 27.5 mm; p = 0.02) but no significantly different PAA ratios. All patients with an RVSP 50 mm Hg had PA diameters 30 mm. The prevalence of PH and systolic left ventricle dysfunction is low in this preselected cohort of patients with severe COPD. In this population, a PAA ratio 1 is not a useful cardiac screening tool for PH. A PA diameter 30 mm could substitute for routinely performed echocardiography in the screening for PH in this patient gr