Key result
Conductance catheter tracks right ventricular stroke volume closely in preclinical testing.
Why the study?
The geometry of the right ventricle makes measurement of its volume by intraventricular fluid conductance more problematical than for the left ventricle.
Does an eight-electrode conductance catheter accurately measure right ventricular volume changes compared to an electromagnetic blood flowmeter in anesthetized greyhounds?
Comparison
Right ventricular volume by conductance catheter vs stroke volume by pulmonary arterial electromagnetic flowmeter
Design
Preclinical study using an eight-electrode conductance catheter
Authors
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Supports conductance catheter for RV volumes in dogs; leaves open human validation before clinical use.
Does an eight-electrode conductance catheter accurately measure right ventricular volume changes compared to an electromagnetic blood flowmeter in anesthetized greyhounds?
Effect estimate: r2 values between 0.82 and 0.98
Catheter measurement of conductance provides a highly correlated estimation of right ventricular stroke volume compared to electromagnetic flowmetry in an animal model.
Woodard et al. (1987) studied Right ventricular volume measurement (n=3). Catheter measurement of intraventricular fluid conductance vs. Pulmonary arterial electromagnetic blood flowmeter was evaluated on Correlation between catheter-measured right ventricular volume change and stroke volume (r2 values between 0.82 and 0.98). Catheter measurement of intraventricular fluid conductance correlated well with stroke volume measured by an electromagnetic flowmeter in greyhounds (r2 values between 0.82 and 0.98).
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