Dopamine is preferred in treatment of shock because of:
Ans. (A) Renal vasodilatory effect(Ref: Katzung 11/e p137)Dopamine acts on D1 , b1 and a1 receptors. Stimulation of D1 receptors cause renal vasodilation, which is useful clinically to improve renal perfusion in shock with oligouria.
Renal vasodilatory effect
Increased cardiac output
Peripheral vasoconstriction
Prolonged action
Adrenergic System