
Keywords: IVUS، سونوگرافی داخل عروقی; BPA, balloon pulmonary angioplasty; CI, cardiac index; CO, cardiac output; CT, computed tomography; CTEPH, chronic thromboembolic pulmonary hypertension; IVUS, intravascular ultrasound; MLD, minimal lumen diameter; NIPPV, non-invasive positive pressure ve