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  "framework" : "HealthKit",
  "identifier" : "/documentation/HealthKit/HKQuery/predicateForElectrocardiograms(symptomsStatus:)",
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  "title" : "predicateForElectrocardiograms(symptomsStatus:)"
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# predicateForElectrocardiograms(symptomsStatus:)

Returns a predicate that matches electrocardiogram samples with the specified symptom status.

```
class func predicateForElectrocardiograms(symptomsStatus: HKElectrocardiogram.SymptomsStatus) -> NSPredicate
```

## Parameters

`symptomsStatus`

The target symptom status.

## Return Value

A predicate that matches electrocardiogram samples with the specified symptom status.

## Discussion

Use this convenience method to create a predicate that matches electrocardiogram samples with the specified symptom status. The following sample uses both the convenience method and a predicate format string to create equivalent predicates.

```swift
let forSymptomStatus = HKQuery.predicateForElectrocardiograms(symptomsStatus: .present)

let status = HKElectrocardiogram.SymptomsStatus.present.rawValue


let explicitForSymptomStatus = NSPredicate(format: "%K == %d", HKPredicateKeyPathECGSymptomsStatus, status)
```

## See Also

[`let HKPredicateKeyPathECGSymptomsStatus: String`](/documentation/HealthKit/HKPredicateKeyPathECGSymptomsStatus)

The key path for the sample’s symptom status.


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