[Impairment of cognitive functions in patients with chronic thromboembolic pulmonary hypertension before and after surgical treatment].

Cognitive impairment in the form of mild dementia was observed in patients with CTEPH before surgery. Six months after the operation, an improvement in cognitive status was revealed, which corresponded to moderate cognitive impairment. At the same time, no complete recovery of cognitive functions was recorded. Patients with CTEPH still experienced the greatest difficulties in the following areas: concentration and counting, memory. A history of stroke, disability, stress (loss of spouse), and a high comorbidity index are associated with a decrease in MMSE scores before surgery. Six months after surgery, MMSE score was affected by a history of stroke, stress (loss of spouse), residual pulmonary hypertension and atrial fibrillation in the early postoperative period.