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# HKHeartbeatSeriesQuery

A query that returns the heartbeat data contained in a heartbeat series sample.

```
class HKHeartbeatSeriesQuery
```

## Topics

### Creating a Heartbeat Series Query

[`init(heartbeatSeries:dataHandler:)`](/documentation/HealthKit/HKHeartbeatSeriesQuery/init(heartbeatSeries:dataHandler:))

Creates a new heartbeat series query.


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