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# HKElectrocardiogram.Lead

The lead used to record a voltage measurement.

```
enum Lead
```

## Topics

### Leads

[`case appleWatchSimilarToLeadI`](/documentation/HealthKit/HKElectrocardiogram/Lead/appleWatchSimilarToLeadI)

Apple Watch Series 4 or later.

### Initializers

[`init?(rawValue: Int)`](/documentation/HealthKit/HKElectrocardiogram/Lead/init(rawValue:))

## Relationships

### Conforms To

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

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

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

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

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

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

---

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