Hi I would be so grateful if someone could tell me what's happening. After initial diagnosis in Feb this year my af seemed to have settled down with a virtually trouble free two months. Last night and again tonight at around he same time whilst watching t.v my heart started to palpatate quite strongly, HB was ok for a while and the it went from 40 to 88 quite rapidly. The whole episode lasted for under an hour. After it settled down I felt completely washed out. Is this something I should expect in the future? Or is it as a result of something I have done, GP changed my medication for heartburn from esmeprosol to ranitadine. Only started taking it yesterday.