Key result
Chronic exposure to azithromycin caused a ≈2-fold increase in peak and late SCN5A currents, promoting intracellular Na+ loading as a potential mechanism for its proarrhythmic effects.
Why the study?
Does azithromycin alter cardiac electrophysiology and ion channel currents in preclinical models?
Does azithromycin alter cardiac electrophysiology and ion channel currents in preclinical models?
Chronic exposure to azithromycin increases cardiac Na+ current, promoting intracellular Na+ loading and providing a mechanistic basis for its proarrhythmic effects.
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Azithromycin may trigger polymorphic VT without QT prolongation; case report leaves open mechanisms and clinical risk assessment.
Yang et al. (2017) studied Proarrhythmia. Azithromycin was evaluated on Electrophysiological effects on cardiac ion channels. Chronic exposure to azithromycin caused a ≈2-fold increase in peak and late SCN5A currents, promoting intracellular Na+ loading as a potential mechanism for its proarrhythmic effects.