Modern imaging techniques including various echocardiographic technologies have become firmly established in the practice of cardiac surgery. The method of intraoperative transesophageal echocardiography (TEE) is of particular significance for ensuring the safety of patients during open heart surgery. This method is necessary for performing reconstructive interventions on the valve apparatus of the heart in patients with initial myocardial dysfunction to assess the anatomical and functional state of the heart and its structures at all stages of surgical treatment. Information obtained in the operation room using TEE allows the surgeon to choose the optimal tactics of surgical intervention, evaluate the results of surgery, and predict the course of early postoperative period. The presented clinical case demonstrates the capabilities of intraoperative use of TEE during the Ozaki procedure in a patient with congenital bicuspid aortic valve.