My son, age 24, has CM and suffers from heart palpitations, which we understand can be one of the effects of CM. He has undergone thorough cardiac evaluation but nothing specific has come up. He takes magnesium and toprol to reduce the palpitations but they don't always alleviate the problem. The palpitations are cyclical, so sometimes he is bothered by them and sometimes sometimes he is not. Do any of you experience the same? How do you treat the situation? Is this something that can be alleviated by decompression surgery.? He hardly is bothered by other CM symptoms. Presently, he is visiting in Israel and is bothered by these symptoms. It is making him nervous. I don't know quite how to advise him as he has been thoroughly worked up at home, here in California. Any advice would be very much appreciated.