Until a little over two months ago, my 81 year old mother had more energy than me: mowed her own lawn and worked as an accountant. She suddenly began having dizzy spells, fainting, and falling. She does have A-fib (atrial fibrillation) but docs have ruled out any other issue with heart, as well as stroke, no excess plaque in arteries, and UTI. Last time she fell, she broke two ribs and punctured a lung. After 9 days in hospital and 13 days of inpatient physical therapy, she's little better. I don't understand how someone goes from healthy to almost non-functional so fast. Does anyone else have this kind of experience?