Vasopressin may be used in cardiac arrest when:
a. The patient has regained consciousness and needs blood pressure support
b. As an antiarrhythmic agent
c. As a replacement for the first or second epinephrine dose
d. To increase heart rate in symptomatic bradycardia
c
Rationale: c. Current guidelines suggest the use of vasopressin to replace the first or second dose of epinephrine in cardiac arrest.
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