I have done alot of reading on the net about palps recently as I have been suffering from them quite badly.... I am on Propranolol which does not seem to help them much.
A few websites said to try Magnesium so I did and after about three days I notice they have lessoned quite a bit, may be nothing to do with it but its worth a go! I take 200mg a day and have noticed a difference.
Tarsh