heartbeat

They give an electric charge or current to the heart to try and restore a normal heartbeat.

Music boasts a lifespan that eclipses any vampire; it’s the heartbeat of humanity that goes back to our very first campground circles.

For example, if your name is Jane and your heartbeat is racing, you can say to yourself, “Jane is feeling really worried right now.”

"Strangely, these days I use it more to determine if someone has no heartbeat rather than if they do," she tells me.

You know she’s the central character because she’s the one who gets all the flashbacks, rendered in the customary sepia tones, each introduced by a sort of heartbeat motif on the soundtrack.