This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'Which of the following muscle relaxants is free of cardiovascular effects over the entire clinical dose range? \nSelect and explain. \nA. Pancuronium, B. Vecuronium, C. Atracurium, D. Pipecuronium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pancuronium rapid IV injection may cause rise in BP and tachycardia due to cabal blockade and NA release. Vecuronium has cardiovascular stability due to lack of histamine release and ganglionic action. Atracuronium hypo tension may occur due to histamine release. Pipecuronium transient hypotension and bradycardia may occur . Hence Vecuronium has cardiac stability. From K D Tripati 7th edition Page no 353', 'role': 'assistant'}]