[Correlation between the anti-arrhythmia effect of ethacizin and pharmacokinetic parameters in a model of rhythm adoption by the heart].
1986
: Pharmacokinetics and pharmacodynamics of ethacizin were studied in a model of rhythm adoption by the heart, with the drug administered intravenously to anesthetized cats. A relation was demonstrated between blood ethacizin pattern and the drug's biphasic effect on the adoption of stimulation-imposed pace by the heart and ventricular fibrillation threshold. The estimated correlation coefficients, reflecting the relationship between the development of ethacizin anti-arrhythmic and antifibrillation effects and variation of its plasma levels between 10 and 120 min after the administration, were rather high (-0.85 and +0.93, respectively). Ethacizin shows anti-arrhythmic and antifibrillation activity when its plasma levels are between 2400 and 200 ng/ml.
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