Fig. 2From: Bupivacaine-dexmedetomidine versus bupivacaine-nalbuphine in ultrasound-guided supraclavicular brachial plexus block: a prospective, randomized, double-blind studyHeart rate changes in the studied three groups. Group BD group bupivacaine-dexmedetomidine, Group BN group bupivacaine-nalbuphine, Group BS group bupivacaine-saline. Values are in mean ± SDBack to article page