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Optical Mapping of Multisite Ventricular Fibrillation Synchronization

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Defibrillation with strong shocks of several hundred volts is still the most effective way to terminate life-threatening cardiac rhythm abnormalities such as ventricular fibrillation (VF). The standing puzzle that has lasted for several decades is why defibrillate with such a high voltage when the activation threshold of cardiac myocytes is much less than 100 mV. Such a conceptual conflict has prompted many theoretical and experimental studies to understand the action of strong shocks.1–7

An important goal in defibrillation study is to reduce the shock energy requirement. Because the quality of life in patients carrying implantable cardioverter-defibrillators (ICDs) is significantly affected by the occurrence of shocks, efforts have been made to decrease the shock energy for less pain and battery drain.8–10 Major progress came in the 1980s when it was realized that biphasic shocks were far superior to monophasic shocks for defibrillation.11,12 Since then, empirical studies of defibrillation waveforms have identified only marginal improvements, suggesting that empirical variation of defibrillation waveform is unlikely to result in conceptual breakthroughs or significant improvements in defibrillation efficacy.

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Tang, L., Lin, SF. (2009). Optical Mapping of Multisite Ventricular Fibrillation Synchronization. In: Efimov, I.R., Kroll, M.W., Tchou, P.J. (eds) Cardiac Bioelectric Therapy. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-79403-7_15

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  • DOI: https://doi.org/10.1007/978-0-387-79403-7_15

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