Effect of low-dose ketamine versus fentanyl on attenuating the haemodynamic response to laryngoscopy and endotracheal intubation in patients undergoing general anaesthesia: a prospective, double-blinded, randomised controlled trial.

Even though the hypertensive episodes observed in the Ketamine group did not reach statistical significance, survival probability against hypertension was analysed and it shows faster development of hypertension in those treated with Ketamine, Logrank test, p<0.001.

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