<prompt> Which of the following neuromuscular blocker is most cardiostable-Vecuroniumd-tubocurareAtracuriumPancuronium  <response>: Benzylisoquinoline group causes histamine release so associated with hypotension and tachycardia. Aminosteroid group - no histamine release in aminosteroid group only pancuronium causes vagal blockade - Hypeension and Tachycardia. 