I have a symptomatic Mitral Valve Prolapse with mitral regurgitation so palpitation is like a daily thing for me plus chest pains and fatigue. I learned about magnesium on the net and tried it right away and since then I no longer have palpitations and it also cured all the other MVP symptoms including insomnia. Just 400mg daily before bedtime. I've been taking it for 5 years now.
My friend had severe heart palpatations that had me driving him to the hostpital one time after he had sat there for 8 hours with an irregular heart beat! The hospital did what they knew to do but nothing worked for him and gave no really useful advice.
For another issue he started taking magnesium and a little zinc. He didn't really notice that he hadn't had a heart palpatation until one day he forgot to take the magnesium. His heart went irregular by about 2pm. He started to get worried.
He remembered he hadn't had his magnesium tablet and within a few minites of taking it the palpatations had completely stopped!
Reading other posts, I wonder if that's why molasses has worked for some people as it has a good supply of magnesium?
Magnesium for heart palpitations/panic attacks: I thank God for this site. I was having scary heart palpitations at night, and I knew it was panic attacks. The only course my doc offered was xanax, and as I was rushed through the visit there was no time to talk alternatives. I am not one of those people who thinks happiness is a pill away. I did my own research, and decided to try a magnesium supplement. The FIRST NIGHT I was heart palpitation-free. I can't believe doctors would rather throw a dangerous pill at you rather than discuss the effects of diet, exercise, and soda (caffeine&aspatame) on your body. Try Magnesium first, and make sure you are getting your potassium too!