My mother has high blood pressure and takes medication to control it. She has no other health problems, which is great considering her advanced age! My concern is that she falls asleep very easily and at any time of the day even after a good night's sleep. Someone actually said it is a sign of congestive heart failure, and this has worried me. Please, is it normal for an elderly person to take little naps all day or is it a sign of something her doctor needs to address?