Hi .couple ears ago I had ECG done, which come out as -QTC 447, LVEF55%, mild MR+PR, which I been told is normal , but recently been experiencing some heart rate abnormalities, which felt like heart was beating extremely fast for couple of minutes , then all of a sudent felt like heart can't beat for few seconds , and would start beat and would go to normal in short period of time . All this lasted no longer then 3-5 min , just felt quet sick ( nausea ) , and short of breath at the same time . Is this something I would need to worry about ? Many thanks