I am fit and run 4-5 days a week. My pulse averages 42-50 b.p.m.

i was thinking the other day. Heaven forbid I was to ever have major
surgery but how would my low pulse affect the surgery? I mean, I know
pain killers like morephine lowere your pulse and breathign, right? If
I have a low pulse anyway, does this mean I would not be able to have
as much painkiller as someone with a higher heartrate?

Like I said I dont plan on this but was just curious.