Could 'Instant breakfast' cause rapid heart rhythms?

[pmhlb]

When I first experienced heart rhythm irregularity a few months ago, I noticed that it was particulary prominent after having a liquid 'Instant Breakfast'.  (It did not matter whether it was the Vanilla, Strawberry or Chocolate.)  Has anyone else noticed this?

I am now on a CPAP machine and my irregular heart rhythm has resolved itself.  

[no_fate]

i get tachycardia and pvc attacks from oats and brown bread,
not so much with white bread.

alcohol, weed, caffeine, etc. all kill me too offcourse.
yesterday was bad pvc day for me, im guessing i ate too much canned food.

[Jerry_NJ]

It may be sugar or caffeine, or both in the drink.  These substances do cause some of us problems.