Which vasoconstrictor is used during CPR as an alternative to epinephrine?

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Multiple Choice

Which vasoconstrictor is used during CPR as an alternative to epinephrine?

Explanation:
During CPR, boosting perfusion to the heart and brain is essential. Vasopressin is used as an alternative to epinephrine because it causes strong vasoconstriction through V1 receptors on vascular smooth muscle, raising systemic vascular resistance and improving coronary and cerebral perfusion pressures during chest compressions. This non-adrenergic mechanism can be advantageous when epinephrine’s effects are less reliable due to conditions like acidosis. Other options either don’t provide this targeted perfusion effect or have less favorable profiles in CPR, so vasopressin is the vasoconstrictor chosen as an alternative to epinephrine.

During CPR, boosting perfusion to the heart and brain is essential. Vasopressin is used as an alternative to epinephrine because it causes strong vasoconstriction through V1 receptors on vascular smooth muscle, raising systemic vascular resistance and improving coronary and cerebral perfusion pressures during chest compressions. This non-adrenergic mechanism can be advantageous when epinephrine’s effects are less reliable due to conditions like acidosis. Other options either don’t provide this targeted perfusion effect or have less favorable profiles in CPR, so vasopressin is the vasoconstrictor chosen as an alternative to epinephrine.

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