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Background: Pulmonary endarterectomy (PEA) is recognized as the best surgical choice for treatment of chronic thromboembolic pulmonary hypertension caused by pulmonary vascular occlusion in eligible patients. This study aims to describe correlations between the daily walk (DW), and the demographic^ and clinical characteristics of patients undergoing pulmonary endarterectomy. Methods: This was a cross-sectional study using data from 32 consecutive patients who had undergone PEA operations and were admitted to the cardiac ward to complete their post-operative rehabilitation. Results: Those with a body mass index of ≥25 kgm2 walked a greater distance during the postoperative rehabilitation phase after PEA compared with those with body mass index <25 kgm2. We also found differences in daily walk distances between women and men: by day 3, the men had already walked a median distance of 240 metres, while women had walked a median distance of 15 metres. Conclusions: The authors found that estimation of the DW was a simple, inexpensive, and reliable pleasure that can help professionals to evaluate patients' post-operative course after PEA. [ABSTRACT FROM AUTHOR]