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Canadian Journal of Anesthesia, Vol 38, 204-209, Copyright © 1991 by Canadian Anesthesiologists' Society

ARTICLES

Comparison of two esmolol bolus doses on the haemodynamic response and seizure duration during electroconvulsive therapy

AL Kovac, H Goto, MP Pardo and K Arakawa
Department of Anesthesiology, University of Kansas Medical Center, Kansas City 66103.

Twelve ASA physical status I-III patients were enrolled in a double-blind, prospective, randomized, three-way, within-patient crossover study designed to determine the effect of two standard esmolol bolus doses (100 and 200 mg) on the haemodynamic response and seizure duration during electro-convulsive therapy (ECT). Esmolol or placebo was administered one minute prior to induction of anaesthesia and exactly two minutes before ECT. Both the 100 and 200 mg bolus doses significantly blunted the maximum increase in heart rate (HR) and mean arterial pressure (MAP) following ECT in comparison with placebo. Compared with placebo, esmolol 100 mg decreased maximum HR by 23 +/- 3%, maximum MAP by 17 +/- 7% and maximum rate-pressure product (RPP) by 40 +/- 9%. Esmolol 200 mg decreased maximum HR by 25 +/- 3%, maximum MAP by 19 +/- 3% and maximum RPP by 42 +/- 5%. No significant difference was found between the two esmolol doses at corresponding measurement points before and after ECT. Treatment with esmolol 200 mg resulted in a significantly shorter mean seizure duration than with placebo. As the 200 mg dose caused a shorter seizure duration and the haemodynamic effects of 100 mg and 200 mg doses were similar, it was concluded that the 100 mg esmolol bolus dose was the better dose for ECT.


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Copyright © 1991 by the Canadian Anesthesiologists' Society.