Hello, Thank you for your query. Am sorry about your mother. A person with massive stroke with a poor prognosis/chance of recovery can survive anywhere from a week to a year (occasionally longer) if there are no further complications. More commonly 3-6 months Kidney failure, sepsis, heart failure, overall health condition (diabetes, hypertension, coronary disease, obesity, age) before the incident all factor in. Recommendations : -Proper nutrition through a feeding tube, parenteral feeding should be given with adequate calories, proteins. - Position must be changes every two hours to prevent bed sores. -Personal hygiene maintained by a trained personnel or family member. -Passive physiotherapy of the limbs to maintain circulation and muscle tone should be done - neuro protective drugs and anti seizure medications may be necessary. The aim is to keep her as comfortable as possible Hope this helps. Please let me know if I can help you with anything else Wish you good health