title: Quantitative radiocardiographic evaluation of cardiac dynamics in man at rest and during exercise.
abstract: 113Inm radiocardiography in conjunction with a gamma camera and a digital computer is applied to measurements of cardiac output, stroke volume, ejection fraction, end-diastolic volume, pulmonary blood volume, pulmonary transfer time and dispersion both at rest and during muscular exercise. A modified gamma function is used in calculations of radiocardiographic curves. In twelve supine male subjects the maximal increase of cardiac output was 220%, stroke volume 30%, ejection fraction 15%, and pulmonary blood volume 30%. The present method provides a non-invasive tool for cardiovascular examinations during exercise.
mesh_terms: D000328:Adult; D001810:Blood Volume; D002302:Cardiac Output; D006321:Heart / Q000502:physiology*; D006801:Humans; D007204:Indium; D008168:Lung / Q000502:physiology; D008297:Male; D005082:Physical Exertion; D011868:Radioisotopes; D012146:Rest; D013318:Stroke Volume
chemical_list: D011868:Radioisotopes; D007204:Indium