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Eur J Anaesthesiol. 1992 Nov;9(6):447-55.

Comparative effects of halothane associated with verapamil and ischaemia on myocardial metabolism in isolated perfused rat hearts.

European journal of anaesthesiology

C C Arvieux, C Pernin, N Drouet, J P Mathieu, S Hamant, F Dubois, P Cuchet, P Stieglitz, M Comet

Affiliations

  1. Département d'Anesthésie Réanimation, Université J. Fourier, C.H.U de Grenoble, France.

PMID: 1425613

Abstract

The association of verapamil with halothane causes ischaemic-like myocardial dysfunction. Using an isolated rat heart model perfused with a radiolabelled fatty acid (123I-labelled iodohexadecenoic acid) as a sensitive marker of ischaemia this study investigated whether or not this dysfunction is of ischaemic origin. Hearts were perfused with a control solution or with solutions containing either 1% of halothane or 150 ng ml-1 of verapamil or the association of 0.75% halothane + 120 ng ml-1 verapamil. The ischaemic group was perfused at a reduced perfusion rate (-50%). Intracellular fate of IHA was assessed, and its esterification ratio computed. Ischaemia and the drugs induced a similar depression of haemodynamics. The esterification ratio in the ischaemic group was significantly higher (0.723 +/- 0.04) than in controls (0.0526 +/- 0.03) and than in the treated groups: halothane (0.533 +/- 0.06), verapamil (0.411 +/- 0.027) or the association halothane+verapamil (0.408 +/- 0.05), suggesting a non-ischaemic origin for the dysfunction caused by halothane-verapamil.

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