I was just checking to see what the prognosis or how long does a person have to live with 20% of heart/valve operaton. My brother is handicapped and had heart surgery 5 years ago, they replaced a valve and he was born with a hole in his heart. He is just short of 60 years old.. and he has been experiencing dizzy.. inner head .. falling down... very very tired.. My sister is his caretaker.. they say it is a waiting game with him and he most likely will go to sleep in the end.. My question is if he went from 35% to 20% in the last couple months... what kind of time are we looking at.?