Inclusion Criteria:  Adult patient (>18 years) Patient hospitalized at the Amiens University Hospital for scheduled thoracic surgery (lobectomy, pneumonectomy, wedge resection). Surgery by thoracotomy or video-assisted thoracic surgery Information of the patient and collection of his non-opposition  Exclusion Criteria:  Patient with poor echogenicity on TTE not allowing evaluation of 2D-STE or conventional parameters of the RV. Patient with a rapid supraventricular rhythm disorder (HR > 100) at the time of TTE Patient under mechanical ventilation Patient under extracorporeal membrane oxygenation Patients under guardianship or legal protection Patients whose clinical condition does not allow for their non-opposition Pregnant women