Epinephrine to raise hr during surgery?

For surgeons who perform awake lipo - with Ativan and opioid like Percocet... and the antinausea pill... If a patients pulse drops to 56 during surgery is it normal to administer epinephrine to raise it back up? Is it normal to not tell the patient this happened until 3 months later? Is this a normal complication and is it serious? Thank you in advance.