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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

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

Creates a new heartbeat series query.

## Relationships

### Inherits From

[`HKQuery`](/documentation/HealthKit/HKQuery)

### Conforms To

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`CVarArg`](/documentation/Swift/CVarArg)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

---

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