1 yr ago I was diagnosed with an ASD. ( small hole) due to palpitations I was having. Had an echo done, internal sonogram of heart, holter monitor, etc. I also had some pvcs but not very many. I also have 1st degree heartblock. Despite all that, doc said heart was healthy. Fast forward to about a week ago. I noticed every time I was up during the day my heart would continueously skip. When I laid down I was ok. Spent 2 nights in hospital. Stress test done, another echo, bloodwork(including magnesium and thyroid), even had a monitor on at all times. All tests came back perfect besides what they already knew and no changes to what I have. When I would stand up and feel these beats missing over and over it would show a little on the monitor. Doctor reviewed them and said everything was perfect. How is this possible? I watched the lines change on the monitor when they would occur!! I was told the monitor was printed every hour so they had something to go off.. So my question is.. With all those tests coming back absolutely normal for me,, should I still be concerned? Went to work today and when I lay down I have maybe one or 2 but when I'm up walking around they are almost constant and it makes me feel short of breath! I'm 28! Yea I have anxiety and I just dont believe they are right.. They prescribed me Xanax.. My heart skips beats,, I can feel it in my pulse that it misses as well.. Can someone give me some insight??