For some reason, this very good movie only has a paltry overall score of 5.9 at this time. It's especially odd since all the reviewers (so far) score the film higher...often quite a bit higher.
"Threshold" is a great name for this movie. After all, it's about someone receiving the first artificial heart and only a year later, a primitive sort of artificial heart was implanted in a human. Because of this, I am not sure the term 'sci-fi' is appropriate. Instead, it's a film about what was about to become...though even to this day, such devices are only experimental.
Dr. Vrain (Donald Sutherland) is one of the foremost heart surgeons in the world. He's an expert at transplants, though he's interested in possibly implanting an artificial heart in the future. So, when he meets a weird biologist (Jeff Goldblum) it appears such an operation might be completed.
This film is not that farfetched and making such procedures seem possible is its great strength. Additionally, while I certainly am no surgeon, the surgeries you see look pretty realistic. However, some might balk at the path the film takes, as very soon after the surgery occurs, the story ends....and my wife hated this. She wanted to know more...though because this is unchartered territory I didn't mind the vague ending.
Overall, some excellent acting and an absorbing story make this worth seeing.