Good subject this thread! I also wondered what DMT did with heart rates as I once had a weird experience with a fast heart rate after smoking a DMT joint(very potent MJ too so it could have been that). Though I also find that my heart(or rather it's "electric center"

can feel strange during meditation (especially on higher dosages of MJ) and it's actually not a change in heart rate when I check my pulse.
Peace
Who is M.G.K.?The darker the night, the brighter the light.
Condemnation without investigation is the heigth of ignorance! As is "mental masturbation" without intuition xD