The mean pulmonary artery pressure (mPAP), pulmonary vascular resistance (PVR), pulmonary arterial wedge pressure (PAWP), cardiac output (CO), 6-min walk distance, and N-terminal pro-B type natriuretic peptide (NT-proBNP) of patients with CTEPH, respectively, were 37.85±9.35 mmHg, 681.7dyn.sec.cm−5 (IQR, 426.8–974 dyn.sec.cm−5), 11.08 ± 2.23 mmHg, 3.5 ± 1.06 L/min, 438.59 ± 102.2 m, and 403 pg/ml (IQR,177–764 pg/ml). Here, NPPB is linked to chronic thromboembolic pulmonary hypertension.