Yesterday and she has been restricted from driving for six months. She isn't "aging" (any more than any of us --- she's only 49) but she was diagnosed with congestive heart failure five years ago when she had an aortic dissection and she has various comorbidities. The defibrillator was implanted about three years ago. If you have experience with afib/defibrillators with your parent or spouse, please tell me: does the fact that the doctor restricted her driving indicate that she's entering a more serious stage of CHF/afib or is this a normal precaution following an afib episode? I figure the doctor thinks it was definitely afib, not a misfire, or he wouldn't have restricted her driving for SIX MONTHS! I'm trying to figure out how to be supportive long distance of my son and DIL, while living with and caregiving for my mother, 600 miles away.