Hey Dabbo,

To get a true reading of your heart you should wear a monitor for a 24 hour period, this shows if your heart rate is high even when your sleeping. I had to have around 4 ECG's and everytime they put the monitor on me my heart rate would go up because I was nervous. Even when I check it myself it will jump up. The monitor goes on your wrist and measures your wrist pulse over 24hrs. This will give you a true indication whether or not its a nervous thing or your heart rate is truly beating more than it should. It could be a TOS thing as a few of us on here have mentioned heart problems. Mine is not really a racing heart its more of a jump / miss in my heart beat every now and then (im talking every couple of weeks) then it just goes back to normal. Good luck with it all!

Ozzy