A member asked:

Why does norepinephrine cause more vasoconstriction than heart rate increase?

8 doctors weighed in across 2 answers
Dr. Andrew Germanovich answered

Specializes in Pain Management

Alpha receptors : The arteries like norepinephrine more and constrict tighter than with epi.

Answered 12/10/2013

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Alpha receptors: Ne has a higher affinity for the Alpha receptors which are located in the peripheral arterioles and cause vasoconstriction. Beta receptors are.Responsible for accelerating the heart rate.

Answered 6/24/2014

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