I also have PVC's and PAC's. My cardiologist says everyone, even he, has them but that I am very aware of all of mine. I have had the stress test, echocardiogram, heart cath and everything is OK. I was told I had a healthy heart with a strong heartbeat and no blockage. He also said that unless you are having other symptoms like...shortness of breath, sweating, passing out, severe chest pain etc, that it wasn't life threatening. He explained that one involves the upper chamber of the heart filling too fast with blood and the other involves the lower chamber. I have found that when I feel these palpitations or stops as I call them, I can either cough very hard or bear down as if having a baby or bowel movement and it returns things to normal. I take metoprolol beta blocker. I did take atenolol but that made them worse. I also have a stethoscope and I listen to them. Sometimes they come every 2-3 minutes and sometimes I have 2 or 3 very close together. I asked an EMT once when I should be worried and he said when I have 10 about every 5 seconds. I also wore a monitor for a month, where you press the thing when you feel them and you can also send an EKG during an episode and it showed that they were occurring about at about 2% even though I had episodes about every 3-4 days. I know one day I must have pressed record at least 50 times. So....unless I'm having other symptoms, I'm not going to worry too much. We are just a couple of the few people that are able to feel the palpitations. Most people don't notice them.