Risk Stratification in Patients With Chronic Thromboembolic Pulmonary Hypertension Following Pulmonary Endarterectomy: The Role of Brain Natriuretic Peptide and High-Sensitivity Troponin I.

At follow-up, 357 patients had normal brain natriuretic peptide and 488 had abnormal brain natriuretic peptide levels; 22 additionally had abnormal hs-TNI plasma levels.

The proportion of patients in World Health Organization functional class III to IV and with compromised exercise capacity increased over the 3 groups (the difference between the abnormal brain natriuretic peptide group and the group with abnormality of both biomarkers did not reach statistical significance).