Join the club, hon. I have palpitations with a normal heart rate. I feel them more after I eat, if I m slightly constipated, if I m slightly gassy feeling. You are probably feeling premature ventricular beats, which is what I have. I did the stress test, holter, yada, yada, yada. I didn t want to take the Toprol because my resting BP is 90/60, but once in awhile I think about starting it just to get a little peace of mind. Unfortunately you are one of those people who feel every skipped beat, just as I do. Yes, it is a major anxiety producer, even after doctor after doctor says it s benign. I just got home from seeing a patient who had a slow pulse with skipped beats, but she never feels them, ever! Lucky woman!!!! You will be absolutely fine during your endoscopy tomorrow. In fact, they will give you something to calm you down and put you in a twilight sleep and I ll bet those palpitations will stop at that time. Our anxiety truly does make things worse, I firmly believe that. When you re anxious, your body produces more adrenaline, which can irritate your heart muscle. Your medication takes care of the rapid heart beat that the adrenaline causes, so you are lucky that you are tolerating the Toprol well. I guess we just have to consider that the pvc s are a part of us, and like people who have other anomalies (less than perfect vision, flat feet, blotchy skin, etc etc) and get along just fine, we will be just fine too. If your anxiety seems to get the best of you often, you may want to ask your physician for a mild sedative type med. There are some very effective medications with minimal side effects that may help improve your quality of life until you can come to terms with your heart beats and your worries about your health. Good luck tomorrow. Come back and add some details to your question, letting us know that you cruised through the endo with flying colors. :)