Fig. 2From: Safety and efficacy of ketamine-dexmedetomidine combination versus dexmedetomidine alone in cirrhotic patients undergoing upper gastrointestinal endoscopy: a prospective controlled clinical trialHeart rate changes in the studied two groups. KD1, ketamine-dexmedetomidine group. D2, dexmedetomidine group. HR, heart rate. Statistically significant drop of HR in group D2 compared with group KD1 (P value < 0.001)Back to article page