description: Regularity of the heartbeat. package_name: nictiz.fhir.nl.r4.nl-core derivation: constraint name: NlcoreHeartRateHeartbeatRegularity type: Observation elements: subject: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/Patient', 'http://nictiz.nl/fhir/StructureDefinition/nl-core-Patient'] index: 0 package_version: 0.12.0-beta.1 class: profile kind: resource url: http://nictiz.nl/fhir/StructureDefinition/nl-core-HeartRate.HeartbeatRegularity base: http://nictiz.nl/fhir/StructureDefinition/zib-HeartRate.HeartbeatRegularity version: null