Key result
Dual-field excitation measures intraventricular volume more accurately than single-field, though both underestimate larger volumes.
Why the study?
The accuracy of the conductance-volume method for assessing left ventricular function is limited by electric field homogeneity and parallel conductance of surrounding structures.
Does dual-field excitation improve the accuracy of intraventricular volume measurement compared to single-field excitation in conductance catheters?
Population
Computer simulations and in vitro nonconductive and conductive models
Comparison
Dual-field excitation vs single-field excitation conductance catheter
Design
Experimental study with computer simulation and in vitro measurements
Authors
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Limits clinical adoption in dilated hearts; hypothesis-generating for dual-field refinement pending human validation.
Does dual-field excitation improve the accuracy of intraventricular volume measurement compared to single-field excitation in conductance catheters?
Dual-field excitation improves the accuracy of conductance catheter volume measurements compared to single-field, but significant underestimation still occurs at larger volumes, limiting its application in dilated hearts.
Wu et al. (1997) studied ventricular volume measurement. Dual-field (DF) excitation vs. Single-field (SF) excitation was evaluated on accuracy of intraventricular volume measurement. Dual-field excitation provided a more accurate measure of intraventricular volume than single-field excitation, though both significantly underestimated true volume at larger volumes.
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