My Mother Is 90 Years Old And Is Bed Ridden

my mother is 90 years old and is bed ridden for the last 6 months, her food intake was very less during this period and that too on liquid food. All of a sudden her right side was paralyzed and she lost her speech now she just has little water & milk and nothing else. her sugar level decreases and her heart beats are irregular.
what are the chances of her recovery, is the matter serious. please advise.