Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol.

OJ Escalona, Vivek Kodoth, NC Castro, Soumya Xavier, PR Walsh, BM Glover, Ernest Lau, Ganesh Manoharan

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

4 Citations (Scopus)

Abstract

The major determinants of success during internal cardioversion of atrial fibrillation (AF) are voltage, duration and intracardiac impedance (ICI). However, there is a paucity of published data regarding evidence of ICI dynamics during internal cardioversion of AF using very-low-tilt rectilinear (VLTR) waveforms with stepped energy protocols. In this study, patients with persistent AF were internally cardioverted using both biphasic and monophasic very-low-tilt rectilinear (B-VLTR and M-VLTR) waveforms with a step up energy protocol (50V to 300V). The ICI of patients who had more than 4 shocks delivered were retrospectively analyzed from recorded voltage and current waveforms. A significant reduction in ICI was noticed after each of the first shocks using B-VLTR. The linear change of ICI within a shock, as characterized by its slope (Zm), increased in algebraic value and presented polarity reversal between the positive and negative phase within a B-VLTR shock, particularly after the first shock, where both B-VLTR and M-VLTR presented positive 2nd derivatives. The results obtained provide valuable evidence for understanding electrode-tissue interface factors depending on VLTR defibrillation waveform amplitude, duration and current reversal action.
LanguageEnglish
Title of host publicationUnknown Host Publication
Place of PublicationIEEE Xplore
Pages721-724
Number of pages4
Volume39
Publication statusPublished - 15 Dec 2012
EventComputing in Cardiology (CinC), 2012 - Krakow, Poland
Duration: 15 Dec 2012 → …

Conference

ConferenceComputing in Cardiology (CinC), 2012
Period15/12/12 → …

Fingerprint

Electric Countershock
Electric Impedance
Shock
Atrial Fibrillation
Thromboplastin
Electrodes

Keywords

  • Atrial fibrillation
  • Defibrillation
  • Electric shock
  • Bioimpedance
  • Protocols
  • Radio frequency
  • Standards
  • bioelectric potentials
  • biological tissues
  • biomedical electrodes
  • cardiology
  • defibrillators
  • diseases
  • electric impedance
  • medical signal processing
  • patient treatment
  • variational techniques
  • waveform analysis.

Cite this

Escalona, OJ., Kodoth, V., Castro, NC., Xavier, S., Walsh, PR., Glover, BM., ... Manoharan, G. (2012). Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol. In Unknown Host Publication (Vol. 39, pp. 721-724). IEEE Xplore.
Escalona, OJ ; Kodoth, Vivek ; Castro, NC ; Xavier, Soumya ; Walsh, PR ; Glover, BM ; Lau, Ernest ; Manoharan, Ganesh. / Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol. Unknown Host Publication. Vol. 39 IEEE Xplore, 2012. pp. 721-724
@inproceedings{1fd9e36fb170457aa13e089700ed8a86,
title = "Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol.",
abstract = "The major determinants of success during internal cardioversion of atrial fibrillation (AF) are voltage, duration and intracardiac impedance (ICI). However, there is a paucity of published data regarding evidence of ICI dynamics during internal cardioversion of AF using very-low-tilt rectilinear (VLTR) waveforms with stepped energy protocols. In this study, patients with persistent AF were internally cardioverted using both biphasic and monophasic very-low-tilt rectilinear (B-VLTR and M-VLTR) waveforms with a step up energy protocol (50V to 300V). The ICI of patients who had more than 4 shocks delivered were retrospectively analyzed from recorded voltage and current waveforms. A significant reduction in ICI was noticed after each of the first shocks using B-VLTR. The linear change of ICI within a shock, as characterized by its slope (Zm), increased in algebraic value and presented polarity reversal between the positive and negative phase within a B-VLTR shock, particularly after the first shock, where both B-VLTR and M-VLTR presented positive 2nd derivatives. The results obtained provide valuable evidence for understanding electrode-tissue interface factors depending on VLTR defibrillation waveform amplitude, duration and current reversal action.",
keywords = "Atrial fibrillation, Defibrillation, Electric shock, Bioimpedance, Protocols, Radio frequency, Standards, bioelectric potentials, biological tissues, biomedical electrodes, cardiology, defibrillators, diseases, electric impedance, medical signal processing, patient treatment, variational techniques, waveform analysis.",
author = "OJ Escalona and Vivek Kodoth and NC Castro and Soumya Xavier and PR Walsh and BM Glover and Ernest Lau and Ganesh Manoharan",
year = "2012",
month = "12",
day = "15",
language = "English",
isbn = "978-1-4673-2076-4",
volume = "39",
pages = "721--724",
booktitle = "Unknown Host Publication",

}

Escalona, OJ, Kodoth, V, Castro, NC, Xavier, S, Walsh, PR, Glover, BM, Lau, E & Manoharan, G 2012, Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol. in Unknown Host Publication. vol. 39, IEEE Xplore, pp. 721-724, Computing in Cardiology (CinC), 2012, 15/12/12.

Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol. / Escalona, OJ; Kodoth, Vivek; Castro, NC; Xavier, Soumya; Walsh, PR; Glover, BM; Lau, Ernest; Manoharan, Ganesh.

Unknown Host Publication. Vol. 39 IEEE Xplore, 2012. p. 721-724.

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

TY - GEN

T1 - Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol.

AU - Escalona, OJ

AU - Kodoth, Vivek

AU - Castro, NC

AU - Xavier, Soumya

AU - Walsh, PR

AU - Glover, BM

AU - Lau, Ernest

AU - Manoharan, Ganesh

PY - 2012/12/15

Y1 - 2012/12/15

N2 - The major determinants of success during internal cardioversion of atrial fibrillation (AF) are voltage, duration and intracardiac impedance (ICI). However, there is a paucity of published data regarding evidence of ICI dynamics during internal cardioversion of AF using very-low-tilt rectilinear (VLTR) waveforms with stepped energy protocols. In this study, patients with persistent AF were internally cardioverted using both biphasic and monophasic very-low-tilt rectilinear (B-VLTR and M-VLTR) waveforms with a step up energy protocol (50V to 300V). The ICI of patients who had more than 4 shocks delivered were retrospectively analyzed from recorded voltage and current waveforms. A significant reduction in ICI was noticed after each of the first shocks using B-VLTR. The linear change of ICI within a shock, as characterized by its slope (Zm), increased in algebraic value and presented polarity reversal between the positive and negative phase within a B-VLTR shock, particularly after the first shock, where both B-VLTR and M-VLTR presented positive 2nd derivatives. The results obtained provide valuable evidence for understanding electrode-tissue interface factors depending on VLTR defibrillation waveform amplitude, duration and current reversal action.

AB - The major determinants of success during internal cardioversion of atrial fibrillation (AF) are voltage, duration and intracardiac impedance (ICI). However, there is a paucity of published data regarding evidence of ICI dynamics during internal cardioversion of AF using very-low-tilt rectilinear (VLTR) waveforms with stepped energy protocols. In this study, patients with persistent AF were internally cardioverted using both biphasic and monophasic very-low-tilt rectilinear (B-VLTR and M-VLTR) waveforms with a step up energy protocol (50V to 300V). The ICI of patients who had more than 4 shocks delivered were retrospectively analyzed from recorded voltage and current waveforms. A significant reduction in ICI was noticed after each of the first shocks using B-VLTR. The linear change of ICI within a shock, as characterized by its slope (Zm), increased in algebraic value and presented polarity reversal between the positive and negative phase within a B-VLTR shock, particularly after the first shock, where both B-VLTR and M-VLTR presented positive 2nd derivatives. The results obtained provide valuable evidence for understanding electrode-tissue interface factors depending on VLTR defibrillation waveform amplitude, duration and current reversal action.

KW - Atrial fibrillation

KW - Defibrillation

KW - Electric shock

KW - Bioimpedance

KW - Protocols

KW - Radio frequency

KW - Standards

KW - bioelectric potentials

KW - biological tissues

KW - biomedical electrodes

KW - cardiology

KW - defibrillators

KW - diseases

KW - electric impedance

KW - medical signal processing

KW - patient treatment

KW - variational techniques

KW - waveform analysis.

UR - http://ieeexplore.ieee.org/

UR - http://www.cinc.org/archives.shtml

UR - http://ieeexplore.ieee.org/

UR - http://www.cinc.org/archives.shtml

M3 - Conference contribution

SN - 978-1-4673-2076-4

VL - 39

SP - 721

EP - 724

BT - Unknown Host Publication

CY - IEEE Xplore

ER -

Escalona OJ, Kodoth V, Castro NC, Xavier S, Walsh PR, Glover BM et al. Linear variation analysis of intracardiac atrial impedance during internal cardioversion using rectilinear waveforms and energy step up protocol. In Unknown Host Publication. Vol. 39. IEEE Xplore. 2012. p. 721-724