Hi, my father is 91 years old and has been a little confused but my mother called me today and he is really confused as in tried to put his shirt on as pants. He has a pacemaker for A-fib and has had it for at least 4-5 years. They have told him that it is running at least 90% of the time. Could he have thrown a clot, I am trying to get him to his doctor but they are at lunch.