Heartbeats

I believe every human has a finite number of heartbeats. I don't intend to waste any of mine.

I'm hearing two heartbeats. You're having twins.

Some people have abnormally fast heartbeats, sometimes as fast as 400 beats per minute.

He has five heartbeats per minute.

The amount of time between the heartbeats of a healthy human is approximately 0.8 seconds.