It is pretty well known that PR is all about the connections, especially connections in the media. It’s public relations, and how else could you build a relationship with the public without reliable media?
Then, that got me thinking about media relations and how similar, different, or interchangeable it was with PR. Which led me to this blog article: http://www.tangmac.com/2010/12/media-relations-vs-public-relations-whats-the-difference/
A professor at the British Columbia Institute of Technology explains that public relations is, as I said, building a relationship between an organization and its publics. Media relations, on the other hand is about the interaction with people in the media, including journalists and reporters. They are, as this professor says, completely different, and therefore, not interchangeable.
However, I see it as that media relations is almost included in the PR job description. So, although they may not be interchangeable, they are certainly interrelated.