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Regional increase of extracellular potassium leads to electrical instability and reentry occurrence through the spatial heterogeneity of APD restitution. Am J Physiol Heart Circ Physiol 2011; 301: H209-20.","DOI":"10.1152\/ajpheart.01141.2010"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Watanabe I, Gettes LS. Initial and secondary ST-T alternans during acute myocardial ischemia in the in-situ pig heart. Int Heart J 2016; 57: 327-35.","DOI":"10.1536\/ihj.15-337"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. Niederer S. Regulation of ion gradients across Myocardial ischemic border zones: A biophysical modelling analysis. PLoS One 2013; 8: e60323.","DOI":"10.1371\/journal.pone.0060323"},{"key":"24","doi-asserted-by":"crossref","unstructured":"24. Kanda A, Watanabe I, Williams ML, <i>et al<\/i>. Unanticipated lessening of the rise in extracellular potassium during ischemia by pinacidil. 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