While lying in a restful state these strong beats came at me ,they are quite frightening, I lifted my hands to over my heart and visualised my clasped hands holding my heart as you would a bird securely but gently, anything to stop this beat, but then for some reason I started to very gently stroke the only visible part of my visualised heart the top with my thumbs and thought soothing thoughts " it's alright, you're ok " type of comments and to my amazement they stopped within seconds.. Each time I had them I repeated the exercise and each time it worked. Now I have these ectopic beats much less often and I can quickly soothe them when they come.
It was my consultant who suggested I told others with these troublesome symptoms my remedy, it would be good if it works for anyone else.
Good luck with it.