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: Anaesthesia
[{'content': 'During surgery after inhalational anesthesia a patient suddenly developed, fever, increased hea rate and BP, acidosis and arrhythmia. What is your first step of intervention \nSelect and explain. \nA. Dantrolene, B. Sodium bicarbonate, C. Procainamide, D. Antipyretics', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Dantrolene Sudden development of fever, tachycardia, hypeension arrhythmia and acidosis after inhalational anesthesia (most probably halogenated drug) or muscle relaxant succinylcholine suggest an episode of malignant hypehermia. The triggering agent must be stopped and dantrolene must be given immediatelyQ.', 'role': 'assistant'}]