title: Radioisotope pulmonary scanning in the pulmonary vascular bed alterations.
mesh_terms: D000328:Adult; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans; D006976:Hypertension, Pulmonary / Q000150:complications; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000175:diagnosis*; D011652:Pulmonary Circulation; D011877:Radionuclide Imaging