This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'Levosimendan is approved in \nSelect and explain. \nA. Hea failure, B. Kidney failure, C. Liver failure, D. Endocrine crisis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Levosimendan is a calcium sensitizer -- it increases the sensitivity of the hea to calcium, thus increasing cardiac contractility without a rise in intracellular calcium.Has been approved for use in acute cardiac failure in EuropeKatzung 13e pg: 220', 'role': 'assistant'}]