The development of TEE - an historical review, J. Roelandt; technology and techniques, O.F.W. Stumper and G.R. Sutherland; TEE in the primary diagnosis of congenital heart disease - normal and anomalous venous connections to the heart, O. Stumper, morphology and pathology of the atrial chambers, O. Stumper, congenital anomalies of the atrioventricular valves, G.R. Sutherland and N. Sreeran, ventricular septal defects, G.R. Sutherland, the left ventricular outflow tract and the aortic valve, G.R. Sutherland, the right ventricular outflow tract and pulmonary arteries, O. Stumper and P. Hoffman; ventriculo-arterial junction anomalies, O. Stumper, the coronary arteries and the thoracic aorta, G.R. Sutherland; TEE as a monitoring technique - intraoperative monitoring of surgical repair, O. Stumper; monitoring of interventional cardiac catheterization, O. Stumper and J. Hess; transcatheter occlusion of atrial and ventricular septal defects, A. Ludomirsky; the follow-up of congenital heart disease - atrioventricular valve repair, A.G. Fraser; prosthetic valves, A.G. Fraser; evaluation of mustard and senning procedures, O. Stumper; evaluation of Fontan-type procedures, O. Stumper and J. Hess; summary, O. Stumper and G.R. Sutherland.