Patients pretreated with _____ agents are prone to epinephrine reversal.

Question

Quizplus · Accepted Answer

The a-adrenergic blocking agents competitively inhibit the vasoconstricting effects of the adrenergic agents.This reduces the sympathetic tone in the blood vessels,producing a decrease in the total peripheral resistance.The resulting decrease in blood pressure stimulates the vagus,thereby producing a reflex tachycardia.Patients who are pretreated with a-adrenergic blocking agents and given epinephrine exhibit a predominance of beta effects,which lowers blood pressure.Epinephrine reversal is caused by adrenergic blocking agents.

Patients Pretreated with _____ Agents Are Prone to Epinephrine Reversal