title: Cardiopulmonary flow studies show venous return from upper half of body passing directly to left atrium.
mesh_terms: D000293:Adolescent; D001775:Blood Circulation; D006321:Heart / Q000000981:diagnostic imaging*; D006325:Heart Atria / Q000000981:diagnostic imaging; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008297:Male; D008863:Microspheres; D011877:Radionuclide Imaging; D014683:Vena Cava, Superior / Q000002:abnormalities*