Accurate delineation of the anatomy of the cardiac chambers and the pulmonary vessels is a necessary component of the preoperative workup in Fallot's tetralogy. Selective right ventriculograms in shallow right anterior oblique and steep left anterior oblique views were used in the evaluation of 65 cases. Our observations indicate that these views display the anatomy of Fallot's tetralogy to a better advantage than do the conventional anteroposterior and lateral views.