Final answer:
Norepinephrine is generally less arrhythmogenic compared to epinephrine, which is an advantage when using it as a pressor agent. It acts more selectively, potentially leading to fewer unwanted cardiac interactions.
The correct option is c.
Step-by-step explanation:
Among the options provided, c) Less arrhythmogenic is the advantage of norepinephrine over dopamine/epinephrine as a pressor. Both epinephrine and norepinephrine can increase heart rate and blood pressure by acting on the beta-1 receptors.
However, norepinephrine is generally considered to be less likely to cause arrhythmias compared to epinephrine. This is because epinephrine has a broader effect on the various adrenergic receptors, potentially leading to more complex cardiac interactions, while norepinephrine acts more selectively.
It's important to note that different pressor agents are chosen based on specific properties that make them more suitable for particular clinical scenarios.
Norepinephrine's relatively more targeted effect on blood vessels without as strong an effect on the heart's rhythm can be beneficial in certain types of shock where increasing blood pressure is the primary goal without provoking cardiac arrhythmias.
The correct option is c.