Based on the information available for PH, the authors screened 49 Chinese CTEPH patients and 17 control patients with prior PE but without signs of PH, for mutations in seven genes (BMPR2, ACVRL1, ENG, SMAD9, CAV1, KCNK3, and CBLN2). The gene discussed is BMPR2; the disease is chronic thromboembolic pulmonary hypertension.