British Journal of Anaesthesia, 1995, Vol. 74, No. 3 330-332
© 1995 The Board of Management and Trustees of the British Journal of Anaesthesia
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Comparison of the haemodynamic effects of mivacurium and atracurium during fentanyl anaesthesia
Department of Anaesthetics, Queen's University of Belfast, Whitla Medical Building 97 Lisburn Road, Belfast BT9 7BL
Department of Anaesthetics, Royal Hospitals Trust Belfast
Correspondence to R.K.M.
We have measured the haemodynamic effects of mivacurium 0.15 and 0.2 mg kg1, and atracurium 0.5 mg kg1 administered over 1015 s in patients undergoing coronary artery bypass surgery under fentanyl anaesthesia. There were no significant haemodynamic changes in the atracurium group, other than a transient decrease in pulmonary arterial wedge pressure. Changes in heart rate were small in all three groups. Mivacurium 0.15 mg kg1 produced changes of only small magnitude (12% decrease in mean arterial pressure and 16% decrease in systemic vascular resistance index) however, mivacurium 0.2 mg kg1 produced a 25% reduction in mean arterial pressure, a 14% increase in cardiac index and a 35% decrease in systemic vascular resistance index. Erythema developed in two, three and seven patients after atracurium, mivacurium 0.15mgkg1 and mivacurium 0.2 mg kg1, respectively. One patient exhibited a 54% decrease in mean arterial pressure, generalized erythema and bronchospasm after mivacurium 0.2mg kg1. The haemodynamic changes with mivacurium suggested histamine release. (Br. J. Anaesth. 1995; 74: 330332)