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Over the past 15 years transesophageal echocardiography (TEE) has assumed an integral role in the diagnosis and management of patients with acquired pediatric cardiovascular disorders and congenital heart disease (CHD). It is particularly suited to define complex anatomical structures, functional abnormalities, and flow disturbances that may not always be obtainable from transthoracic echocardiography (TTE) alone. TEE has become a standard imaging technology for patients with CHD undergoing intervention in the catheterization laboratory or in the operating room. 1-9 As miniaturized probes, novel technologies, and new methodologies develop, the applications of TEE in the patient with CHD continue to expand. 10-13 The American Society of Echocardiography (ASE) and the Society of Cardiovascular Anesthesiologists have established guidelines and standards for performing a comprehensive TEE in …