This document discusses the diagnosis of several cyanotic heart diseases using chest X-ray, electrocardiogram, and physical exam findings. It outlines that tricuspid atresia can be diagnosed by a murmur, decreased pulmonary vascular markings, and decreased right ventricular forces with left axis deviation. Ebstein's anomaly presents with a murmur, enlarged cardiac silhouette, right axis deviation, and WPW syndrome. Tetralogy of Fallot shows decreased pulmonary vascular markings, murmur, and right ventricular hypertrophy.