Sudden onset of bradycardia during the intra-operative period under anaesthesia is relatively uncommon. It’s possible. Deeper planes of anesthesia, high spinal anesthesia, a surgical stimulus of the parasympathetic system, pre-existing cardiac illness, beta-blocker medication, or intraoperative medications such as Clonidine, Dexmedetomidine may all contribute to this. Arrhythmias in the...