title: A simple technique for detecting small defects of the atrial septum.
mesh_terms: D000818:Animals; D006328:Cardiac Catheterization; D004285:Dogs; D004395:Dye Dilution Technique; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D007208:Indocyanine Green; D007275:Injections, Intravenous; D008722:Methods; D014636:Valsalva Maneuver; D014682:Vena Cava, Inferior
chemical_list: D007208:Indocyanine Green