NPPB and pulmonary arterial hypertension: We designed a modified Risk Assessment Score of PAH (mRASP) comprising four non-invasive variables which were World Health Organization functional class(WHO FC), 6-min walk distance (6MWD), N-terminal of the pro-hormone brain natriuretic peptide(NT-pro BNP), and right atrial area(RAA), then validated it in the prediction of one-year survival rate for patients with PAH by contrast with the REVEAL risk score.