There is an extra heartbeat.

Alcohol can directly injure heart cells and cause extra heartbeats and supraventricular tachycardias.

She heard a muted thud that felt like nothing more to her than an extra heartbeat.

It is not uncommon for children to have extra heartbeats.

In healthy children, an extra heartbeat is not a cause for concern.

It beat in Kerwin like an extra heartbeat, and he felt Elorie, at his side, trembling.

"Probably the blow produces an extra heartbeat, which elicits a degenerative arrhythmia," he said.

"We feel he has that extra heartbeat," he said.

I let that hang in the phone line an extra heartbeat before replying to it.

One of the patients had had an extra heartbeat with a compensatory pause.