I was supposed to be on blood thinners for 3 months after my mitral valve repair which was successful and Im feeling great. I had 1 AFib event 3 weeks after surgery. Also I have arrythmias that last a few seconds that were detected by wearing a cardiac event device for a month. I was in cardiac rehab and no arrythmias were ever detected. Now I have to be on blood thinners continually. I read that this is common after heart surgery. Has anyone else experienced this?