Gemmell Philip, Burrage Kevin, Rodríguez Blanca, Quinn T Alexander
Department of Computer Science, University of Oxford, Oxford, UK.
Department of Computer Science, University of Oxford, Oxford, UK; School of Mathematical Sciences and ARC Centre of Excellence, ACEMS, Queensland University of Technology, Brisbane, Australia.
Prog Biophys Mol Biol. 2016 Jul;121(2):169-84. doi: 10.1016/j.pbiomolbio.2016.06.003. Epub 2016 Jun 16.
Computational modelling, combined with experimental investigations, is a powerful method for investigating complex cardiac electrophysiological behaviour. The use of rabbit-specific models, due to the similarities of cardiac electrophysiology in this species with human, is especially prevalent. In this paper, we first briefly review rabbit-specific computational modelling of ventricular cell electrophysiology, multi-cellular simulations including cellular heterogeneity, and acute ischemia. This mini-review is followed by an original computational investigation of variability in the electrophysiological response of two experimentally-calibrated populations of rabbit-specific ventricular myocyte action potential models to acute ischemia. We performed a systematic exploration of the response of the model populations to varying degrees of ischemia and individual ischemic parameters, to investigate their individual and combined effects on action potential duration and refractoriness. This revealed complex interactions between model population variability and ischemic factors, which combined to enhance variability during ischemia. This represents an important step towards an improved understanding of the role that physiological variability may play in electrophysiological alterations during acute ischemia.
计算建模与实验研究相结合,是研究复杂心脏电生理行为的有力方法。由于该物种心脏电生理与人类相似,使用兔特异性模型尤为普遍。在本文中,我们首先简要回顾了兔特异性心室细胞电生理的计算建模、包括细胞异质性的多细胞模拟以及急性缺血。本小型综述之后是一项原创性计算研究,研究了两个经过实验校准的兔特异性心室肌细胞动作电位模型群体对急性缺血的电生理反应变异性。我们对模型群体对不同程度缺血和个体缺血参数的反应进行了系统探索,以研究它们对动作电位持续时间和不应期的个体和联合影响。这揭示了模型群体变异性与缺血因素之间的复杂相互作用,这些相互作用共同增强了缺血期间的变异性。这代表了朝着更好地理解生理变异性在急性缺血期间电生理改变中可能发挥的作用迈出的重要一步。