Key result
Enoximone boosts cardiac output and heart rate post-CABG but fails to blunt dobutamine-induced vasoconstriction.
Why the study?
The interaction between enoximone and dobutamine in patients taking beta adrenoceptor antagonists was unclear, particularly regarding haemodynamic effects.
Does enoximone affect the haemodynamic actions of dobutamine in post-CABG patients taking beta adrenoceptor antagonists?
Comparison
Masked infusion of enoximone vs masked infusion of normal saline, both followed by dobutamine infusion at three rates
Design
Randomized double-blind study
Follow-up
Immediate postoperative period
Authors
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Enoximone may augment output in beta-blocked post-CABG patients; confirms no mitigation of dobutamine vasoconstriction and supports targeted combination studies.
RCT (n=16)
Double-blind
randomized
Does enoximone affect the haemodynamic actions of dobutamine in post-CABG patients taking beta adrenoceptor antagonists?
In post-CABG patients on beta-blockers, enoximone improves cardiac output but increases fluid requirements, while dobutamine primarily causes peripheral vasoconstriction without inotropic benefits.
Harvey et al. (1995) conducted an RCT in Post-coronary artery bypass operations (n=16). Enoximone vs. Normal saline was evaluated on Haemodynamic effects (cardiac output, heart rate, systemic vascular resistance). Enoximone increased cardiac output and heart rate compared to saline, but did not alter the peripheral vasoconstriction produced by dobutamine in post-CABG patients on beta-blockers.
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