Key result
Impedance cardiography correlates well with dye dilution for stroke volume changes but underestimates absolute values.
Why the study?
The accuracy and reliability of impedance cardiography for measuring stroke volume compared to the dye dilution technique in healthy individuals was evaluated.
Does impedance cardiography accurately measure stroke volume compared to the dye dilution technique in healthy men?
Population
11 healthy men
Comparison
Impedance cardiography vs dye dilution technique
Design
Simultaneous measurement comparison study
Authors
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Supports tracking stroke volume changes noninvasively; leaves open calibration needs for absolute accuracy.
Observational (n=11)
Does impedance cardiography accurately measure stroke volume compared to the dye dilution technique in healthy men?
Effect estimate: r=0.82
p-value: p=<0.001
Impedance cardiography is a reliable non-invasive method for tracking changes in stroke volume, but it underestimates absolute stroke volume compared to dye dilution and requires calibration.
Milsom et al. (1982) conducted an observational in Healthy (n=11). Impedance cardiography vs. Dye dilution technique was evaluated on Stroke volume (r=0.82, p=<0.001). Impedance cardiography correlated well with dye dilution for stroke volume changes (r=0.82), but significantly underestimated absolute mean stroke volume (P<0.001).
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