Why the study?
Do volatile anesthetics (halothane, isoflurane, sevoflurane) depress cardiac sodium current in ventricular myocytes?
Population
Single ventricular myocytes isolated enzymatically from adult guinea pig hearts
Comparison
Volatile anesthetics vs Baseline/control (no anesthetic)
Design
Preclinical
Authors
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May contribute to halothane-related dysrhythmias; hypothesis-generating for differential volatile effects and requires clinical validation.
Do volatile anesthetics (halothane, isoflurane, sevoflurane) depress cardiac sodium current in ventricular myocytes?
Volatile anesthetics decrease cardiac sodium current in a dose- and voltage-dependent manner, with halothane exerting twice the depressant effect of isoflurane or sevoflurane, providing a potential mechanism for anesthesia-induced dysrhythmias.
Weigt et al. (1997) studied this question.
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