long last, my Potassium levels were dangerously low due to the wrong medication for high blood pressure. I am now on a drip to get the Potassium into my body as quickly as possible and after being on the drip for 4 hours my heart is in Sinus rhythm. I am listed for a Cardioversion tomorrow, but I do not think I will need it if the SR continues. Has anyone else had this? The cardiologist said I may still have AF afterwards, time will tell, I live in hope.