What are actions of dopamine?

Cardiovascular: Dopamine exerts a stimulatory effect on the β1 receptors of the heart, having both inotropic and chronotropic effects At very high doses, dopamine activates α1 receptors on the vasculature, resulting in vasoconstriction. Renal and visceral: Dopamine dilates renal and splanchnic arterioles by activating dopaminergic receptors (D1) increasing blood flow to the kidneys and other viscera Note: Similar dopamine receptors are found in the autonomic ganglia and in the CNS.