---
title: HKHeartbeatSeriesQueryDescriptor.Heartbeat
framework: healthkit
role: symbol
role_heading: Structure
path: healthkit/hkheartbeatseriesquerydescriptor/heartbeat
---

# HKHeartbeatSeriesQueryDescriptor.Heartbeat

Data about an individual heartbeat.

## Declaration

```swift
struct Heartbeat
```

## Topics

### Accessing Heartbeat Data

- [precededByGap](healthkit/hkheartbeatseriesquerydescriptor/heartbeat/precededbygap.md)
- [timeIntervalSinceStart](healthkit/hkheartbeatseriesquerydescriptor/heartbeat/timeintervalsincestart.md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)

## See Also

### Running Queries

- [results(for:)](healthkit/hkheartbeatseriesquerydescriptor/results(for:).md)
- [HKHeartbeatSeriesQueryDescriptor.Results](healthkit/hkheartbeatseriesquerydescriptor/results.md)