Formation of a border ischemic zone depends on plasma potassium concentration
Olesya Bernikova,
Aleksandra Durkina,
Mikhail Gonotkov
et al.
Abstract:Extracellular potassium concentration might modify electrophysiological properties in the border zone (BZ) of ischemic myocardium. We evaluated the depolarization and repolarization characteristics across the ischemic-normal border under [K+] variation. 64-lead epicardial mapping was performed in 26 rats ([K+] 2.3-6.4 mM) in a model of acute ischemia/reperfusion. The animals with [K+]<4.7 mM (low-normal potassium) had an ischemic zone with ST-segment elevation and activation delay, a BZ with ST-segment elev… Show more
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