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Fig. 1 | Journal of Medical Case Reports

Fig. 1

From: Unexpected hypotension in catecholamine reversal: a case report

Fig. 1

Alpha-adrenergic and β-adrenergic effects of vasoactive catecholamines. Alpha-adrenergic receptors promote peripheral vasoconstriction, β1-adrenergic receptors increase chronotropic and inotropic effects, and β2-adrenergic receptors increase vasodilation. If α-adrenergic receptor antagonists are simultaneously administered with catecholamine agents, α-adrenergic effects are masked, and β-adrenergic effects are predominantly enhanced. Consequently, vasodilation occurs and blood pressure decreases. HR heart rate

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