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December 1, 1987AJP Heart and Circulatory Physiology

Improved cardiac cell excitation with symmetrical biphasic defibrillator waveforms

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Why the study?

Do symmetrical biphasic rectangular waveforms reduce excitation threshold in cultured cardiac cells compared to monophasic waveforms?

Population

100- to 250-microns aggregates from 10- to 12-day-old chick embryos (cultured cell model)

Comparison

Symmetrical biphasic rectangular waveforms vs Corresponding monophasic waveforms

Design

Preclinical

Authors

JJJanice L. JonesRJR. E. JonesGBG. Balasky

Discussion

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Overview

May inform waveform selection in defibrillators; leaves open translation from cell models to clinical efficacy.

Structured PICO

Do symmetrical biphasic rectangular waveforms reduce excitation threshold in cultured cardiac cells compared to monophasic waveforms?

P
Population
100- to 250-microns aggregates from 10- to 12-day-old chick embryos (cultured cell model)
I
Intervention
Symmetrical biphasic rectangular waveforms
C
Comparator
Corresponding monophasic waveforms
O
Outcome
Excitation thresholdsurrogate

Symmetrical biphasic waveforms significantly decrease the excitation threshold in cultured cardiac cells compared to monophasic waveforms, supporting their improved efficacy for defibrillation.

Cite This Study

Jones et al. (1987) studied this question.

synapsesocial.com/papers/6a8a97b40e1a8f7244fd8575https://doi.org/10.1152/ajpheart.1987.253.6.h1418
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Improved defibrillator waveform safety factor with biphasic waveforms1983 · 93 citations
  2. 2Improved safety factor for triphasic defibrillator waveforms.1989 · 21 citations
  3. 3Postshock Potential Gradients and Dispersion of Repolarization in Cells Stimulated with Monophasic and Biphasic Waveforms1998 · 6 citations
  4. 4Threshold reduction with biphasic defibrillator waveforms1995 · 25 citations
  5. 5Electrophysiological Effects of Monophasic and Biphasic Stimuli in Normal and Infarcted Dogs1990 · 49 citations