Why the study?
Myocardial ischemia can induce ventricular arrhythmias leading to sudden death, prompting study into the activity pattern of ischemia-related ventricular tachycardia and the effect of increased extracellular potassium concentration on arrhythmia vulnerability.
Population
Whole ventricular electrophysiological model of endocardial ischemia from distal LAD occlusion
Comparison
Effects of varying extracellular potassium concentrations
Design
Cardiac modeling and simulation study
Authors
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Caution against changing clinical potassium targets in ischemia; leaves open translation from animal models.
Computational modeling demonstrates a bell-shaped relationship between extracellular potassium concentration and ventricular arrhythmia vulnerability during ischemia, peaking at 12 mM.
Geng et al. (2021) studied this question.
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