Global Variable

HKCategoryTypeIdentifierLowHeartRateEvent

A category sample type for low heart rate events.

Declaration

const HKCategoryTypeIdentifier HKCategoryTypeIdentifierLowHeartRateEvent;

Discussion

The system creates HKCategoryTypeIdentifierLowHeartRateEvent samples whenever Apple Watch produces a low heart rate notification. For more information, see Heart rate notifications on your Apple Watch.

The low heart rate samples are read-only. Use this identifier to request permission to read these samples; however, you can’t request authorization to share them, and you can’t save new low heart rate events to the HealthKit store.

These samples have a value of HKCategoryValueNotApplicable. They also include HKMetadataKeyHeartRateEventThreshold metadata.

Topics

Metadata Keys

HKMetadataKeyHeartRateEventThreshold

A key that records the threshold of high or low heart rate events in beats per minute.

See Also

Vital Signs

HKQuantityTypeIdentifierHeartRate

A quantity sample type that measures the user’s heart rate.

HKCategoryTypeIdentifierHighHeartRateEvent

A category sample type for high heart rate events.

HKCategoryTypeIdentifierIrregularHeartRhythmEvent

A category sample type for irregular heart rhythm events.

HKQuantityTypeIdentifierRestingHeartRate

A quantity sample type that measures the user’s resting heart rate.

HKQuantityTypeIdentifierHeartRateVariabilitySDNN

A quantity sample type that measures the standard deviation of heartbeat intervals.

HKQuantityTypeIdentifierWalkingHeartRateAverage

A quantity sample type that measures the user’s heart rate while walking.

HKDataTypeIdentifierHeartbeatSeries

A series sample containing heartbeat data.

HKQuantityTypeIdentifierOxygenSaturation

A quantity sample type that measures the user’s oxygen saturation.

HKQuantityTypeIdentifierBodyTemperature

A quantity sample type that measures the user’s body temperature.

HKCorrelationTypeIdentifierBloodPressure

Blood pressure correlation types combine a systolic sample and a diastolic sample into a single blood pressure reading.

HKQuantityTypeIdentifierBloodPressureSystolic

A quantity sample type that measures the user’s systolic blood pressure.

HKQuantityTypeIdentifierBloodPressureDiastolic

A quantity sample type that measures the user’s diastolic blood pressure.

HKQuantityTypeIdentifierRespiratoryRate

A quantity sample type that measures the user’s respiratory rate.

HKQuantityTypeIdentifierVO2Max

A quantity sample that measures the maximal oxygen consumption during incremental exercise.