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Updated: May 24, 2026

Electrophysiological Analysis of human Pluripotent Stem Cell-derived Cardiomyocytes (hPSC-CMs) Using Multi-electrode Arrays (MEAs)
Published on: May 12, 2017
Triphasic and quadriphasic waveforms are superior to biphasic waveforms for synchronized beating of cardiomyocytes
Lars Enochson1, Joakim Sandstedt, Hans Strandberg
1Department of Clinical Chemistry and Transfusion Medicine, The Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden. lars.enochson@gu.se
Multielectrode arrays (MEAs) enable efficient screening of cardiomyocyte pacing waveforms. Triphasic and quadriphasic waveforms reduce stimulus amplitude for synchronized beating compared to biphasic ones.
Area of Science:
- Biomedical Engineering
- Cardiology
- Cellular Electrophysiology
Background:
- Optimizing pacemaker waveform phase sequences for cardiomyocyte synchronization is crucial but underexplored.
- Multielectrode arrays (MEAs) provide a platform for high-throughput electrophysiological screening of cardiomyocytes.
Purpose of the Study:
- To investigate the efficacy of different waveform phase sequences in synchronizing cardiomyocyte beating.
- To screen pacing waveform designs using an MEA system for preliminary analysis.
Main Methods:
- Cultured HL-1 cardiomyocytes to confluence on MEAs.
- Stimulated cells with biphasic, triphasic, and quadriphasic electrical waveforms.
- Determined the minimum amplitudes required for synchronized cellular beating.
Main Results:
- Triphasic and quadriphasic waveforms demonstrated higher efficiency in eliciting synchronized cardiomyocyte beating.
- These advanced waveforms allowed for significant reductions in required synchronizing voltage amplitudes.
- Reduced stimulus energy was also observed with triphasic and quadriphasic waveforms compared to biphasic.
Conclusions:
- The MEA system offers a direct method for evaluating waveform design effects on in vitro cardiomyocyte synchronization.
- Increasing the number of phase changes in pacing waveforms appears to be key to reducing synchronizing amplitudes.
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