[Intraoperative transesophageal echocardiography as monitoring procedure in noncardiac surgery patients]

Transesophageal echocardiography (TEE) is firmly established in cardiac surgery for diagnostics, hemodynamic monitoring and as a guiding tool. Dynamic and (patho)physiological processes of the heart can be immediately depicted. Ideally, therapeutic changes can be derived. For this reason, TEE is increasingly used in high-risk non-cardiac surgery interventions and in the interventional setting. In the first part of this advanced training series, general aspects regarding TEE examinations as well as indications and contraindications are presented. Clinical fields of application, where TEE can play a role in hemodynamic monitoring are outlined. The second part focusses on an emergency examination pathway and differential diagnoses, which can be made in the event of intraoperative hemodynamic instability or unexplained hypoxemia using TEE. The article concludes with an outlook on the use of computer-aided evaluation of TEE images.