Objective: To evaluate the benefit of peroperative Transesophageal echocardiography (TEE) during cardiac surgery. Design: An observational analytic study. Place and duration of study: This study was carried out in the department of Cardiac Surgery Civil Hospital. Dow Medical College Karachi and Dow University of Health Sciences. https://www.ealisboa.com/great-deal-Pentair-Union-Collar-2-U11-200PS-super-offer/