The beneficial effects of epinephrine in cardiac arrest are thought to be due to its:
a. Alpha adrenergic effects
b. Beta adrenergic effects
c. Dopaminergic effects
d. Parasympathetic effects
a
Rationale: a. Correct.
b. While epinephrine has beta adrenergic effects, it is thought that the alpha1 effects of vasoconstriction have more of a role in increasing blood flow through coronary vessels.
c. Epinephrine does not have dopaminergic effects.
d. Epinephrine does not have parasympathetic effects.
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