It might be that Gabriel was the only human heartbeat in the entire universe.

He remembered; the beat had been identical with the human heartbeat.

'Has the way been discovered to restore the human heartbeat through electrical shock?'

The sounds came close to resembling a human heartbeat, but probably were not, investigators said.

"The single-cylinder action is like a human heartbeat," defined Durand.

When she opened them, the blue lights were blazing, pulsating to the rhythm of a human heartbeat.

"If he turns up his hearing and actually listens, he'll hear that you don't have a human heartbeat," said Wayne.

He would have to stop that, their hearing was keen enough to pick a human heartbeat out of the background noise.

Outside, in the space of a human heartbeat, two things happened.

One of the touchable sculptures is a swing, which when ridden produces a human heartbeat.