I have been through the ringer with heart testing. I am overly concerned about a heart attack or heart disease. I am 33, healthy, exercise, eat fairly well (I am not perfect), skinny, and get my annual CBC which checks for cholesterol and triglycerides. The only thing against me is a family history, though, I have no first degree relatives that had problems. I have been diagnosed with mild MVP(mitral valve prolapse) which is a benign condition; however, it can be attributed to my heart palpitations which I have episodes quiet frequently. I guess what I am saying is heart palpitations are normal, especially when all other conditions have been ruled out as in my case. My cardiologist is not concerned, but I still get yearly exams. They suck, they are alarming, they can scare the crap out of you when there is a long series of them in a row. I had a holter monitors up to 72 hours. It caught a series of palpitations and the doctor said they were still benign, not life threatening. My doctor told me if they seem to get in a long series that don't stop, splash cold water on your face and chest. It sort of shocks you back into rhythm. Obviously, this advice was only given after she determined I had no significant problems. She always tells me, though, if something changes come see her. You are not alone.