Why the study?
Does halothane alter membrane potentials and ionic currents in guinea pig atrial and ventricular myocytes?
Population
Single guinea pig atrial and ventricular cells prepared by an enzymatic dispersion procedure
Comparison
Halothane (2%) vs Control (absence of halothane)
Design
Preclinical
Authors
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Halothane's ion current depression in guinea pig myocytes warrants anesthetic caution; leaves open human translation and clinical relevance.
Does halothane alter membrane potentials and ionic currents in guinea pig atrial and ventricular myocytes?
Halothane shortens the ventricular action potential by depressing the slow inward calcium current, while its depression of both potassium and calcium currents in atrial cells results in no significant change in action potential duration.
Hirota et al. (1989) studied this question.
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