windyshores, I never found medical literature on K2 and afib. I thought it could be just that supplements are not well studied. I asked every endocrinologist I consulted with why they didn't recommend K2. While some are unaware of it's use. The best bone guys said there was just no evidence of it's value. The extant literature (mechanism of action not clinical trials) is completely positive about the use-- for bones, for cancer, for heart, for liver disease.
The endocrinologists (I've seen, except one ) don't recommend calcium supplements either. You are probably too young to remember the days when those Citrical bottles were prominant on every endo-desk.
I was taking 90mcg x3 daily MK7 plus the underthetongue 4mcg MK4 Now I'm once a day with the 90 and twice with the 4, but I only take 500mg calcium in split dose.
What do they do when you go to the ER ? Is it IVfluids to try and raise your blood pressure and then just watch until your heart rights itself.
You have fascinating body. Do you plan to give it to science in the end.