King Kong 2: Yomigaeru Densetsu (1986)

A giant ape King Kong, which was shot and fell off the World Trade Center tower, appears to be alive, but is in coma for 10 years and desperately needs a blood transfusion in order to have an artificial heart implanted. Suddenly, in the rainforest, another gigantic ape is found - this time a female. She is brought to the USA, and the heart is successfully implanted. But then King Kong, having sensed the female ape, breaks loose.