I have seen that various members have found a trigger to their AF.some mention a large meal might bring it on.I'd be interested to know if my trigger is experienced by anyone else.The start of an AF episode with me is almost always. when I am asleep and is it a coincidence that it also happens when I turn on to my righthand side ? Usually OK when I sleep on my left hand side or on my back. I wake up with my heart racing up and down,giddy and generally feeling very ill and that will last on and off for the next few days. The first occasion I had it I was diagnosed with labyrinithitis ( severe vertigo )despite not having an ear problems and that diagnosis lasted for six months as no AF was ever caught on an ECG until I had a Holter monitor fitted.