Summary
Experimental studies have shown that reperfusion of transiently ischaemic myocardium can result in the induction of severe ventricular arrhythmias such as ventricular fibrillation (VF). Incidences of such arrhythmias have been documented in man also; however, their clinical importance remains unclear. Although several mechanisms have been proposed for reperfusion arrhythmogenesis, current experimental evidence suggests that the intracellular accumulation of Ca2+ (Ca2+ overload) may be the final trigger responsible for the induction of VF. Intracellular Ca2+ accumulation itself may be induced or exacerbated by a number of components associated with reperfusion. Among these are the generation of free oxygen radicals and associated oxidant stress, and activation of the sarcolemmal Na +/H+ exchanger; these components may act in a synergistic manner to disrupt Ca2+ homeostasis and thereby induce VF.
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© 1994 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG, Darmstadt
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Avkiran, M. (1994). Ionic and metabolic progenitors of reperfusion arrhythmias. In: Zehender, M., Meinertz, T., Just, H. (eds) Myocardial Ischemia and Arrhythmia. Steinkopff. https://doi.org/10.1007/978-3-642-72505-0_6
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DOI: https://doi.org/10.1007/978-3-642-72505-0_6
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