I have noticed in all the postings I have read, nobody mentions a huge cause/trigger which is SLEEP APNEA! I had Afib 2 years before it was diagnosed as being not only most likely the cause but also affects all organs and has caused me to have memory loss from the brain being deprived of oxygen during your sleep. Stress is my biggest factor as I do not drink, smoke, caffiene or any other known stimulates. People get a sleep study!!! I was not breathing 30 times per hour and had no clue except my bp sometimes was up in the AM and otherwise fine. Im thinking WHY is bp up after sleeping??? It is caused by sleep apnea putting your body in "flight and Flight mode" panic in your sleep! Ask your Dr for a Sleep Study!