Most of those are fun drugs that as long as you get rescue breaths you’d survive but the digoxin and amitriptyline aren’t so fun for your heart. You might need external pacing for those. Getting repeatedly shocked from your skin to keep your heart going is about as pleasant as it sounds.
Interestingly, foxglove or digitalis, the basis for digoxin, was historically used as a suicide poison. Yellow oleander, which is similar, is a common southeast asia suicide method.
My dad will occasionally get an arrhythmia that requires correction by shock. One time the attending staff didn’t wait for the anesthesia to fully kick in before proceeding with treatment, so he was awake enough to feel it. He said it was one of the worst experiences of his life.
I forgot to add, often for cardioversion instead of a of a general anesthesia with something like propofol they’ll do a deep sedation with midazolam(a similar drug to diazepam used in this cocktail). That way you don’t need as many specialized staff and it’s a much cheaper procedure to perform and less risky as deeper levels of sedation carry greater risk. The benefit of midazolam is it generally prevents the formation of memories even if you are somewhat responsive. It doesn’t always though. I wouldn’t say it was incompetence that caused him to remember, just luck of the draw.
Edit: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1768594/ about 1 in 50 according to this article