I will also add that the video is likely a reenactment of the actual experiment:
The legitimacy of the film is controversial, with some commentators suggesting it is a recreation of the actual experiments, which were more modest. According to some scientists who claimed to have seen the experiments in the film, the severed dog head only survived for a few minutes when attached to the artificial heart, as opposed to the hours claimed in the film.
Read: Experiments in the Revival of Organisms
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