Many additives can cause PVC's and a racing heart in "some" people. Phenylanine which is in most diet sodas for
example. Splenda sweetener can cause it, mono and dyglicerides can do it, for
some people caffeine, alcohol, watch out for
the ingredients of chinese food, there is one that starts with a "g" watch out for
that. Hydrochloride can cause it in some people prone to PVC's and the list goes on.