This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Mechanism of action of levosimenden is ? \nSelect and explain. \nA. Inoconstrictor, B. Potassium channel opener, C. Sodium channel opener, D. Beta blocker', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b i.e., Potassium channel opener Levosimendon A new ionodilator is Levosimendon It has inodilator effect by: i) Inotropic effect : Levosimendon is calcium sensitiser, i.e. it increases the sensitivity of the hea to calcium that results in increased cardiac contractility without a rise in intracellular calcium. ii) Vasodilatory effect : by opening ATP-sensitive potassium channels in vascular smooth muscles it causes smooth muscle relaxation.', 'role': 'assistant'}]