Replied by Maria (Gippsland, Australia) on 09/15/2011
Magnesium deficiency is definitely a suspect, you could try rubbing magnesium oil on your skin (chest, abdomen, calves & arms) especially before going for a run. Potassium can be a cause. As both of these are part of your electrolyte balance they can be suspected when the palpitations are happening due to exercise.
B-12, B-6 & Folate deficiency can also cause it. Whilst Folic acid deficiency can be a cause chances are that being vegan you are getting lots of folic acid and excess folic acid can mask a B-12 deficiency.
Replied by Gavin (Manganui, Northland, New Zealand) on 09/15/2011
Take a multi vitamin.. Or eat a banana a day.. Its low potassium or magnesium.. It will slowly clear up if you do this. Over 21 years of age you have to replace all the water soluble vitamins and minerals daily. Or drop your sodium intake as to much lowers the potassium. My arrythmia has totally gone due to the Multi vit but before that a banana would do the trick.Replied by T (Houston, Usa) on 09/16/2011
On the recommendation of my naturopath, I cut out all sugars, sweets, and fruits from my diet. Apparently the excess usgar was causing the pancreas to overwork and this was caushing heart palpitations (in my case). After a few weeks of no sugars, I gradually added a fruit a day and now I am palpitation free.
Please try this, it might help you too.