What effect do propranolol and isoproterenol have on CI?
A) Propranolol will decrease CI; isoproterenol will increase CI
B) Propranolol will increase CI; isoproterenol will decrease CI
C) Both will increase CI
D) Both will decrease CI

Question

Quizplus · Accepted Answer

Propranolol is a beta-blocker and will decrease heart rate and contractility, leading to a decrease in cardiac output and therefore cardiac index (CI). Isoproterenol is a beta-agonist and will increase heart rate and contractility, leading to an increase in CI.

What Effect Do Propranolol and Isoproterenol Have on CI