I've had plenty of AFib episodes in the past seven years and most of them could be traced to a trigger. I've had all sorts - alcohol, eating just before bedtime, lying on my left hand side or on my back or stomach, drinking very cold water and stress to name but a few.
However, sometimes I go into fibrillation and there doesn't have to be a trigger (or one that is obvious to me at least). Take yesterday for example, apart from a small bag of crisps at lunchtime, I think I ate well with porridge for breakfast, salmon with pasta salad for my main meal and some fruit throughout the day, but, from about 5pm onwards, I started experiencing plenty of ectopic beats. This is often a sign that an AFib episode is on the way and, sure enough, my heart started playing up as soon as I laid on my bed on my right hand side to watch some TV at about 9pm.
I managed to stave that episode off by walking up and down stairs a few times, but about an hour and half later I went to bed and slipped into AFib about ten minutes later (again while lying on my right hand side. I've been in AFib ever since and this time I get the definite feeling that there was nothing I could do to avoid it - does that often happen with you?