Much is spoken of AF triggers and some people believe in them, others don't. All my recent AF episodes (last couple years) have been after alcohol, cold sugary drink late at night, or a particularly spicy Indian meal. From what I've read, the vagus nerve is the culprit. However, if I go from a warm house into a cold garden and exert myself, I get that 'feeling' that tells me to be on the lookout for an episode. It doesn't happen because I employ deep slow breathing that sends it away. Does anybody else get affected by temperature changes like this and is the vagus nerve the cause again?