Why the study?
Does quantitative radiocardiography accurately measure cardiac output and right ventricular volumes compared to the direct Fick method in normal subjects and patients with heart or lung disease?
Population
Cardiovascular normals, emphysematous subjects, and patients with various types of heart disease
Comparison
Quantitative radiocardiography vs Direct Fick method
Design
Cross-sectional
Authors
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May support quantitative radiocardiography for cardiac output assessment; leaves open prospective validation before clinical adoption.
Does quantitative radiocardiography accurately measure cardiac output and right ventricular volumes compared to the direct Fick method in normal subjects and patients with heart or lung disease?
Quantitative radiocardiography provides valid measurements of cardiac output and right ventricular volumes that correlate well with the direct Fick method.
Lewis et al. (1962) studied this question.
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