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A novel ultrasound technique to estimate right ventricular geometry during fibrillation.

Publication ,  Journal Article
Eason, J; Gades, NM; Malkin, RA
Published in: Physiological measurement
May 2002

Finite element modelling of the heart for the purpose of studying the electric fields of defibrillation shocks requires knowledge of the geometry of the heart during fibrillation. However, the standard method of measuring this geometry, MRI. cannot be used during fibrillation because the heart geometry changes rapidly and perhaps unpredictably. We present a new ultrasound approach to measuring the right ventricular geometry during fibrillation and preliminary data using this technique. In six anaesthetized pigs, we find that a short axis cross-sectional area of the right ventricle increases by 38% during a 30 s episode of ventricular fibrillation. A long axis cross-sectional area increases by 19% during this same time. By fitting parameters of a simple geometric model to the experimental data, we estimate that the volume of blood in the right ventricular cavity increases by approximately 30% during the episode of ventricular fibrillation. We present the first study of the RV area during-fibrillation with the estimated volume. Our data suggest changes in defibrillation threshold may be linked to current shunting through the increased blood volume.

Duke Scholars

Published In

Physiological measurement

DOI

EISSN

1361-6579

ISSN

0967-3334

Publication Date

May 2002

Volume

23

Issue

2

Start / End Page

269 / 278

Related Subject Headings

  • Ventricular Fibrillation
  • Sus scrofa
  • Models, Cardiovascular
  • Male
  • Heart Ventricles
  • Female
  • Electric Countershock
  • Echocardiography
  • Cardiac Volume
  • Biomedical Engineering
 

Citation

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Eason, J., Gades, N. M., & Malkin, R. A. (2002). A novel ultrasound technique to estimate right ventricular geometry during fibrillation. Physiological Measurement, 23(2), 269–278. https://doi.org/10.1088/0967-3334/23/2/303
Eason, James, Naomi M. Gades, and Robert A. Malkin. “A novel ultrasound technique to estimate right ventricular geometry during fibrillation.Physiological Measurement 23, no. 2 (May 2002): 269–78. https://doi.org/10.1088/0967-3334/23/2/303.
Eason J, Gades NM, Malkin RA. A novel ultrasound technique to estimate right ventricular geometry during fibrillation. Physiological measurement. 2002 May;23(2):269–78.
Eason, James, et al. “A novel ultrasound technique to estimate right ventricular geometry during fibrillation.Physiological Measurement, vol. 23, no. 2, May 2002, pp. 269–78. Epmc, doi:10.1088/0967-3334/23/2/303.
Eason J, Gades NM, Malkin RA. A novel ultrasound technique to estimate right ventricular geometry during fibrillation. Physiological measurement. 2002 May;23(2):269–278.
Journal cover image

Published In

Physiological measurement

DOI

EISSN

1361-6579

ISSN

0967-3334

Publication Date

May 2002

Volume

23

Issue

2

Start / End Page

269 / 278

Related Subject Headings

  • Ventricular Fibrillation
  • Sus scrofa
  • Models, Cardiovascular
  • Male
  • Heart Ventricles
  • Female
  • Electric Countershock
  • Echocardiography
  • Cardiac Volume
  • Biomedical Engineering