After smoking/eating/vaporizing in that order cannabis since 24 - now at 50 my heart rhythm is too fast - how do i "heal" my heart - cessation, exerci?

Marijuana : Stop putting a poison into your body, get on a mediterranean diet, exercise at least half hour a day and see your doc to be sure you don't have something that needs to be treated.

Heart too fast: Recommendations: 1) stop cannabis. This is reminiscent of the old advice, "if you find yourself in a hole, the first thing is to stop digging." 2) get help if you can't stop it. 3) see your doctor pronto. 4) would not start exercise without physician oversight. (ultimately, exercise is a good idea - just not with a pre-existing rapid heart rate unless medically cleared) good luck!

Evaluate heart : The cardiac issues are primary, and you need to see a cardiologist asap, but must note that until this gets clarified, best to avoid any form of cannabis. Unless you live where marijuana is regulated, and quality controlled by state health agencies, you do not know what additives are present in your "stash". Stop drugs, see doctor. Good luck.