The 84-year-actor was admitted to Kokilaben Hospital in an emergency condition on July 7. He had suffered a cardiac arrest and since then he has been in the ICU.
"We had done a MRI and it shows significant damage to his brain due to decreased oxygen supply to brain, when he had a cardiac arrest. There is less chance that he will recover. Chances of him regaining consciousness are also less," Dr Ram Narain, COO, Kokilaben hospital, told PTI.
"There are no medicines that will reverse the brain damage... Only if a miracle happens. He might even slip into coma," he said.
The commonwealth wrestling champion entered film industry in the fifties and is known for his roles in 'King Kong' and 'Faulad'. He was last seen in Imtiaz Ali's 'Jab We Met' (2007) playing Kareena Kapoor's grandfather.
The veteran actor had played the character of Hanuman in Ramanand Sagar's epic television series 'Ramayan'.