title: Quantitation of cardiac output components in the presence of bidirectional shunts.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001783:Blood Flow Velocity; D002302:Cardiac Output; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology*; D006801:Humans; D006819:Hyaline Membrane Disease / Q000150:complications*; D007231:Infant, Newborn; D008433:Mathematics; D008863:Microspheres; D012756:Sheep