Dopamine is preferred in treatment of shock because of:: (A) Renal vasodilatory effect, (B) Increased cardiac output, (C) Peripheral vasoconstriction, (D) Prolonged action
Answer is A. 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.