I travelled to during Christmas and started having palpitations about 4 hours into the flight, the flight was about 7 hours long. I must confess that I was extremely anxious about flying. My had friend recently had health challenges that was made worse by travelling. So this made me very anxious about flying. It subsided a few days after but started again when travelling back to the UK and has been quite consistent since then.
I have had palpitations in the past and had the holter monitor, as well as ecg and echo but nothing was found other than my ecg was abnormal but 2 doctors told me they don't know why and its probably normal for me.
I really don't know if its anxiety/stress or something to investigate, I also have to travel again in Feb.