alexa Relation between plasma lignocaine levels and induced haemodynamic changes.
Anesthesiology

Anesthesiology

Journal of Anesthesia & Clinical Research

Author(s): Binnion PF, Murtagh G, Pollock AM, Fletcher E

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Abstract Intravenous lignocaine (1 mg./kg. body weight) was found to produce insignificant haemodynamic changes, and in particular no reduction in myocardial contractility. A rate of 2 mg./minute infused intravenously is suggested for therapeutic purposes.In anaesthetized dogs an infusion of 13.5 mg./minute caused moderate haemodynamic depression and a maximum plasma level of 7 mug./ml. Massive injections of 200 and 400 mg. of lignocaine produced a maximum plasma level of 13.8 and 27.8 mug./ml., respectively, and in the latter failure of myocardial contraction in the presence of a normal E.C.G. ensued ("pump failure"). Lignocaine appears to alter the uptake of calcium by myocardial sarcoplasmic reticulum, and this may explain the negative inotropic effect of large doses.
This article was published in Br Med J and referenced in Journal of Anesthesia & Clinical Research

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