Risk stratification in patients with residual pulmonary hypertension after pulmonary endarterectomy

•Few studies address the issue of risk stratification in patients with residual pulmonary hypertension after pulmonary endarterectomy•Risk stratification can be refined if pulmonary arterial compliance and arterial oxygen tension are considered with hemodynamic parameters.•It is thus possible to identify a subgroup of patients who have an event rate similar to that of patients without residual pulmonary hypertension.•Risk stratification can be used to guide therapy in such patients.