This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Which among the following is it best inotrope drug for use in right hea failure 
Select and explain. 
A. Dobutamine, B. Digoxin, C. Dopamine, D. Milrinone
D: Milrinone
Answer: D: Milrinone 
Explanation: (Ref Goamnan and Gilman, 11/e p575, inotropic drugs are not used for treatment of right sided where the major treatment is diuretics and vasodilators. Milriinone being a phosphodiesterase inhibitor act as an inodilator. Thus, this is the only inotropic drug that should be used in right sided failure due to its ablity to produce vasodilation. It is indicated in right hea failure with pulmonary hypeension.