Sure have. We used polygraphs to intimidate confessions out of the innocent and the guilty.
Read up from National heart associations how the human heart ACTUALLY works, not how benfactor stakeholders fabricate how the heart works.
The heart is a very unreliable thing. That comes from the research groups themselves.
The question was/is, have you ever been interviewed and polygraphed by a professional investigator where you were the subject of an investigation.