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February 1, 1986IEEE Transactions on Biomedical Engineering

Measurement of Ventricular Volume by Intracardiac Impedance: Theoretical and Empinrcal Approaches

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Population

Canine hearts and a numerical three-dimensional volume model

Comparison

Empirical discrete resistor model and numerical… vs Standard equation V = pL2/R

Design

Preclinical

Authors

RSRodney W. SaloUniversity of MinnesotaTWThomas WallnerUniversity Hospital Carl Gustav CarusBPBrian PedersonLa Jolla Institute for Immunology

Discussion

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Implication

Requires parallel resistance correction for absolute volumes but not stroke volume in animal models; leaves open human validation of intracardiac impedance.

Structured PICO

P
Population
Canine hearts and a numerical three-dimensional volume model
I
Intervention
Empirical discrete resistor model and numerical model for computing ventricular volume from intracardiac impedance
C
Comparator
Standard equation V = pL2/R
O
Outcome
Effect of parallel tissue resistance, catheter position, and contraction of the other ventricle on computed ventricular volumes and stroke volumesurrogate

This study demonstrates that while parallel tissue resistance significantly affects absolute ventricular volume measurements by intracardiac impedance, stroke volume calculations remain robust against tissue resistance, catheter position, and contralateral ventricular contraction.

Cite This Study

Salo et al. (1986) studied this question.

synapsesocial.com/papers/6a71466e2163a0a01bc56e82https://doi.org/10.1109/tbme.1986.325890
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Continuous stroke volume and cardiac output from intra-ventricular dimensions obtained with impedance catheter1981 · 300 citations
  2. 2Resistivity of Body Tissues at Low Frequencies1963 · 449 citations
  3. 3Instantaneous measurement of left and right ventricular stroke volume and pressure-volume relationships with an impedance catheter.1984 · 130 citations
  4. 4Computation of the Input Impedances of a Catheter for Cardiac Volumetry1984 · 55 citations
  5. 5Numerical Heat Transfer and Fluid Flow1981 · 15,200 citations