Heartbeat is the regular pulsation of the heart, typically felt as a throbbing in the arteries.
In technology, heartbeat refers to a periodic signal generated by hardware or software to indicate normal operation.
The term "heartbeat" also refers to:
1. The essential or most vital part of something ("the heartbeat of the city")
2. A song by the Swedish DJ duo Heartbeat
3. A 2016 South Korean television series