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Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy.

Publication ,  Journal Article
Tomassoni, G; Pendekanti, R; Dixon-Tulloch, E; Miner, B; Fain, ES; Hoffmann, DA; Wolf, PD
Published in: Journal of cardiovascular electrophysiology
November 1997

The role of edge effects and electrode surface area of the right ventricular (RV) transvenous lead (TVL) on defibrillation efficacy is unknown.Defibrillation threshold (DFT) testing was conducted randomly in 12 dogs using ring electrode leads in an RV/SVC (superior vena cava) or RV/SVC/patch system. The leads (RV-4, RV-8t, RV-8, RV-15) had electrode surface areas of 20%, 20%, 40%, and 70%, respectively. A computer model predicted the magnitude of electrode surface current (RV-8t > RV-4 > RV-8 > RV-15) and the potential distribution (PD) at four sites: electrode surface (site a) and at 2 mm (b), 4 mm (c), and 8 mm (d) away from the surface. Despite different near-field PDs (sites a, b, c), PDs were nearly identical at site d. Resistance decreased as the surface area increased. DFT energy for the RV-15 lead was lower than the RV-4 and RV-8t. There was no difference between energy requirements for the RV-15 and RV-8 leads. No difference was found in DFT current for each lead. Comparison of the RV-8t and RV-4 leads showed no difference in DFT energy despite a lower resistance and a greater number of edges.Increasing the RV TVL surface area lowered the resistance. However, surface area coverages > or = 40% did not lower DFT energy. No significant change in DFT current occurred despite different predicted near-field current densities. PDs were nearly identical 8 mm from the electrode surface. Thus, the far-field current density appears to play a more important role in determining defibrillation success.

Duke Scholars

Published In

Journal of cardiovascular electrophysiology

DOI

EISSN

1540-8167

ISSN

1045-3873

Publication Date

November 1997

Volume

8

Issue

11

Start / End Page

1246 / 1254

Related Subject Headings

  • Ventricular Fibrillation
  • Electrodes
  • Electric Countershock
  • Electric Conductivity
  • Dogs
  • Cardiovascular System & Hematology
  • Animals
  • 3201 Cardiovascular medicine and haematology
  • 1102 Cardiorespiratory Medicine and Haematology
 

Citation

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Tomassoni, G., Pendekanti, R., Dixon-Tulloch, E., Miner, B., Fain, E. S., Hoffmann, D. A., & Wolf, P. D. (1997). Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy. Journal of Cardiovascular Electrophysiology, 8(11), 1246–1254. https://doi.org/10.1111/j.1540-8167.1997.tb01015.x
Tomassoni, G., R. Pendekanti, E. Dixon-Tulloch, B. Miner, E. S. Fain, D. A. Hoffmann, and P. D. Wolf. “Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy.Journal of Cardiovascular Electrophysiology 8, no. 11 (November 1997): 1246–54. https://doi.org/10.1111/j.1540-8167.1997.tb01015.x.
Tomassoni G, Pendekanti R, Dixon-Tulloch E, Miner B, Fain ES, Hoffmann DA, et al. Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy. Journal of cardiovascular electrophysiology. 1997 Nov;8(11):1246–54.
Tomassoni, G., et al. “Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy.Journal of Cardiovascular Electrophysiology, vol. 8, no. 11, Nov. 1997, pp. 1246–54. Epmc, doi:10.1111/j.1540-8167.1997.tb01015.x.
Tomassoni G, Pendekanti R, Dixon-Tulloch E, Miner B, Fain ES, Hoffmann DA, Wolf PD. Importance of electrode conductive surface area and edge effects on ventricular defibrillation efficacy. Journal of cardiovascular electrophysiology. 1997 Nov;8(11):1246–1254.
Journal cover image

Published In

Journal of cardiovascular electrophysiology

DOI

EISSN

1540-8167

ISSN

1045-3873

Publication Date

November 1997

Volume

8

Issue

11

Start / End Page

1246 / 1254

Related Subject Headings

  • Ventricular Fibrillation
  • Electrodes
  • Electric Countershock
  • Electric Conductivity
  • Dogs
  • Cardiovascular System & Hematology
  • Animals
  • 3201 Cardiovascular medicine and haematology
  • 1102 Cardiorespiratory Medicine and Haematology