Real-time three-dimensional trans-oesophageal echocardiography-guided balloon dilation of pulmonary venous pathway obstruction in a patient with dextro-transposition of the great arteries after atrial switch surgery: a case report.

A percutaneous transcatheter balloon dilation of a pulmonary venous pathway obstruction was successfully performed in a 40-year-old patient after a Mustard procedure. During the procedure, real-time three-dimensional trans-oesophageal echocardiography demonstrated the morphology of the obstruction. Our case highlights the usefulness of real-time three-dimensional trans-oesophageal echocardiography as a guide for transcatheter intervention in the increasing number of adults with CHD.