The nomograms were developed as online network software.<h4>Results</h4>Tricuspid regurgitation velocity, right ventricular diameter, N-terminal pro-brain natriuretic peptide (NT-proBNP), the red blood cell count, New York Heart Association functional class and sex were non-invasive independent variables of severe PH in patients with COPD. This evidence concerns the gene NPPB and chronic obstructive pulmonary disease.