An electrode system with rounded edges for direct ventricular defibrillation

Koning, Giel G.; Schneider, H.; Reneman, Robert S.; Hoelen, Adriaan J.

doi:10.1007/bf02474110

Cited by 12 publications

(1 citation statement)

References 10 publications

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“…Large electrodes may create a more homogeneous field than small electrodes 24,25 . Small electrodes may yield a heterogeneous distribution of transmyocardial current, a situation in which the superiority of the biphasic waveform might be more evident 26,27 . The relationship of the paddle electrode size to the size of the heart may influence the current field distribution.…”

Section: Discussionmentioning

confidence: 99%

Open‐Chest Epicardial “Surgical” Defibrillation:

Zhang

Davies

Coddington

et al. 2003

Pacing Clinical Electrophis

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The aim of the study was to compare biphasic versus monophasic shocks for open-chest epicardial defibrillation. Transthoracic biphasic waveform shocks require less energy to terminate ventricular fibrillation compared to monophasic waveform shocks. However, if biphasic shocks are effective for open-chest epicardial ("surgical") defibrillation has not been established. Twenty-eight anesthetized adult swine (15-25 kg) underwent a midline sternotomy. Ventricular fibrillation was electrically induced. After 15 seconds of ventricular fibrillation, each pig in group 1 (n = 16) randomly received damped sinusoidal monophasic epicardial shocks and truncated exponential biphasic epicardial shocks from large (44.2 cm2) paddle electrodes at eight energy levels (2-50 J). Pigs in group 2 (n = 12) received monophasic and truncated exponential biphasic shocks from small (15.9 cm2) paddle electrodes. In group 1 (large paddle electrodes), the overall percent shock success rose from 15 +/- 9% at 2 J to 97 +/- 3% at 50 J. In this group there was no significant difference in percent of shock success between damped sinusoidal monophasic and biphasic waveform shocks. In group 2 (small paddle electrodes), biphasic shocks yielded a significantly higher percent of shock success than monophasic shocks at mid-energy levels from 7 to 20 J (all P < 0.01). With small surgical paddle electrodes, biphasic waveform shocks demonstrated a significantly higher percent of shock success rate compared to monophasic waveform shocks. With large paddle electrodes, the two waveforms were equally effective.

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Section: Discussionmentioning

confidence: 99%