I had palptiations because of anxiety/stress for around 6 months. I could at least feel one a day everyday.
What I did was look at ways to lower stress hormones, and found that three things have eliminated palptitations.
1. Omega 3
2. Vitamin C 2000-4000mg a day
Vitamin C stress buster
I found that I don't get anxious when or have those adrenaline rushes all the time when I take high dose of vitamin C throughout the day, usually 1000mg every few hours.
And omega 3 is something you must have in your diet, or atleast supplement it... Its very good for anxiety/depression and other problems.
CR Blood results http://www.matthewlake.plus.com/results.htm
Blood Pressure = 90/60
Total Cholesterol = 109mg (2.8)
HDL cholesterol = 39mg/dl
LDL cholesterol = 58mg/dl
Triglycerides = 53mg/dl