I showed this text to a friend who works in internal medicine (so not a cardiologist but probably much closer than most commenters).
Basic comment was that the person confuses and misunderstands many things. According to my friend, the range marked as "missed beat" contains a premature heart beat [1].
Some more comments:
- Premature hear beats happen in us quite frequently
- CT scans are a rather invasive diagnostic method and such be avoided
So unless some more competent doctor comments otherwise, I take this as a nice story that resonates well in our layperson's minds. Not more.