Aruna Shanbaug was the Indian nurse who was raped and strangled with a chain in 1973. It cut off oxygen to her brain stem, leaving her comatose for 42 years.

A junior nurse, Shanbaug was brutally raped by contract sweeper boy Sohanlal B. Walmiki in the same hospital on the night of November 27, 1973 when she was changing.
He sodomized her and choked her with a dog chain which cut off oxygen supply to her brain, resulting in injuries to the brain stem and cervical chord injury that left her in a vegetative state since then.
Source-Medindia