Carrie Underwood recalled the story of the song to The Boot
"Zach Crowell and Ashley Gorley came in to write with me that day. They had some stuff going, some ideas, and Zach's so good at putting together music and grooves and things like that … Of course there's always about 20 different ideas that everybody's working on at all times, right? So it's like, 'Well, if you like it, we can go with it, and if not, we can find something else,' and I said, 'This is really cool. Let's live here for a bit and see what happens.'
It's so simple. The word 'heartbeat' isn't in a ton of songs, but it just seemed to be so honest and refreshing, the way we started writing it, things that we would want our lives to be, a simple kind of love. Everybody gets so busy and caught up in everything. You're always - at least I'm always - trying to hang out with a million different people all the time. Sometimes you just want to be like, 'Can it just be me and you for a second?' and I feel like that's kind of where it was coming from, and everyone can relate to that."