Simultaneous double external DC shock techniques for atrial fibrillation

A simulation study

D. Konakanchi, Amy Curry

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The success rate of direct current cardioversion (DCC), the most common method to convert atrial fibrillation (AF) to sinus rhythm (SR), depends on various factors including AF duration, prior anti-arrhythmic therapy, electrode position and size, transthoracic impedance, and the use of biphasic versus monophasic shocks. Recent, small clinical studies have reported using quadruple electrodes to deliver higher energy, in order to increase DCC success rates in refractory patients. This study aims to computationally model and compare double shock defibrillation with conventional single shock DCC, based on the two parameters, defibrillation threshold (DFT) and heterogeneity index (HI). DFT is the energy required to achieve a voltage gradient of 5 V/cm over 95% of the atrial myocardium. HI, calculated as the (95th-5th)/ 50th percentile of atrial electric field magnitudes, is a measure of non-uniformity. The electric field distributions in the myocardium were generated for over Ave thousand different conventional and quadruple electrode placements with electrodes of two different sizes. Results show that there is a significant decrease in DFT (p<0.01) and HI (p<0.01) with increase in electrode size and quantity.

Original languageEnglish (US)
Title of host publicationProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
Pages1745-1748
Number of pages4
StatePublished - Dec 1 2008
Externally publishedYes
Event30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - Vancouver, BC, Canada
Duration: Aug 20 2008Aug 25 2008

Other

Other30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
CountryCanada
CityVancouver, BC
Period8/20/088/25/08

Fingerprint

Atrial Fibrillation
Shock
Electrodes
Electric Countershock
Myocardium
Electric fields
Impedance Cardiography
Anti-Arrhythmia Agents
Refractory materials
Birds
Electric potential
Therapeutics

All Science Journal Classification (ASJC) codes

  • Computer Vision and Pattern Recognition
  • Signal Processing
  • Biomedical Engineering
  • Health Informatics

Cite this

Konakanchi, D., & Curry, A. (2008). Simultaneous double external DC shock techniques for atrial fibrillation: A simulation study. In Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 (pp. 1745-1748). [4649514]

Simultaneous double external DC shock techniques for atrial fibrillation : A simulation study. / Konakanchi, D.; Curry, Amy.

Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. 2008. p. 1745-1748 4649514.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Konakanchi, D & Curry, A 2008, Simultaneous double external DC shock techniques for atrial fibrillation: A simulation study. in Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08., 4649514, pp. 1745-1748, 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08, Vancouver, BC, Canada, 8/20/08.
Konakanchi D, Curry A. Simultaneous double external DC shock techniques for atrial fibrillation: A simulation study. In Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. 2008. p. 1745-1748. 4649514
Konakanchi, D. ; Curry, Amy. / Simultaneous double external DC shock techniques for atrial fibrillation : A simulation study. Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. 2008. pp. 1745-1748
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