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
[{'content': 'Which among the following is the best inotrope drug for use in right hea failure? \nSelect and explain. \nA. Dobutamine, B. Digoxin, C. Dopamine, D. Milrinone', 'role': 'user'}, {'content': "Answer: D \nExplanation: Drugs with beta-adrenergic and dopaminergic D1 agonist have a positive inotropic effect. Milrinone is a phosphodiesterase 3 inhibitor that works to increase the hea's contractility and decrease pulmonary vascular resistance. (REF. Essentials of medical pharmacology KD TRIPATHI 8th Edition)", 'role': 'assistant'}]