Comput Methods Programs Biomed - Averaging in vitro cardiac field potential recordings obtained with microelectrode arrays.

Tópicos

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Resumo

Extracellular field potential (FP) recordings with microelectrode arrays (MEAs) from cardiomyocyte cultures offer a non-invasive way of studying the electrophysiological properties of these cells at the population level. Several studies have examined the FP properties of cardiomyocytes of various origins, including stem cell-derived cardiomyocytes. This focus reflects growing importance and interest in the field of MEA. High-quality cardiac FP signals are often difficult to obtain, especially from stem cell-derived cardiomyocyte cultures, which represent an important new field in cardiac electrophysiology. One way to improve the quality of these recordings is to average the cardiac FP signals. To date, however, no studies have examined the effect of averaging on cardiac FP signals. We report here that cardiac FP averaging can yield higher-quality signals than original individual FPs, and therefore promise more accurate detection of different phases and analysis of the cardiac FP signal. Averaged signals improved the signal-to-noise ratio (SNR), and obtaining reliable averages required approximately 50 cardiac cycles. We therefore propose that routine cardiac FP averaging can serve as a tool to compare the effects of different experimental conditions or stimuli on the properties of cardiac FPs.

Resumo Limpo

extracellular field potenti fp record microelectrod array mea cardiomyocyt cultur offer noninvas way studi electrophysiolog properti cell popul level sever studi examin fp properti cardiomyocyt various origin includ stem cellderiv cardiomyocyt focus reflect grow import interest field mea highqual cardiac fp signal often difficult obtain especi stem cellderiv cardiomyocyt cultur repres import new field cardiac electrophysiolog one way improv qualiti record averag cardiac fp signal date howev studi examin effect averag cardiac fp signal report cardiac fp averag can yield higherqu signal origin individu fps therefor promis accur detect differ phase analysi cardiac fp signal averag signal improv signaltonois ratio snr obtain reliabl averag requir approxim cardiac cycl therefor propos routin cardiac fp averag can serv tool compar effect differ experiment condit stimuli properti cardiac fps

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