Abstract
By analysing the radiocardiograms with an analogue computer the right heart, pulmonary, and left heart blood volumes were determined in 15 subjects without cardiopulmonary disease and in 10 patients with mitral stenosis. The right and left heart blood volumes were both greater in the patients with mitral stenosis than in the normal subjects. The pulmonary blood volumes did not differ significantly in the groups studied. In the normal group the right and left heart blood volumes were almost equal. In patients with mitral stenosis the right heart blood volume was significantly greater than the left heart blood volume. The intracardiac blood volumes had a significant positive correlation with the radiographic heart volumes in both groups studied. The right heart blood volume had a positive correlation with the pulmonary blood volume in both groups; with the left heart blood volume this was the case only in the normal group.
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