{

"resourceType": "ActivityDefinition",
"id": "heart-valve-replacement",
"text": {
  "status": "generated",
  "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n    </div>"
},
"status": "draft",
"description": "Heart valve replacement",
"purpose": "Describes the proposal to perform a Heart Valve replacement.",
"usage": "This activity definition is used as the definition of a procedure request to perform a heart valve replacement. Elements that apply universally are defined here, while elements that apply to the specific setting of a referral within a particular order set are defined in the order set.",
"useContext": [
  {
    "code": {
      "system": "http://hl7.org/fhir/usage-context-type",
      "code": "age"
    },
    "valueCodeableConcept": {
      "coding": [
        {
          "system": "https://meshb.nlm.nih.gov",
          "code": "D000328",
          "display": "Adult"
        }
      ]
    }
  },
  {
    "code": {
      "system": "http://hl7.org/fhir/usage-context-type",
      "code": "user"
    },
    "valueCodeableConcept": {
      "coding": [
        {
          "system": "http://snomed.info/sct",
          "code": "309343006",
          "display": "Physician"
        }
      ]
    }
  }
],
"topic": [
  {
    "coding": [
      {
        "system": "http://snomed.info/sct",
        "code": "34068001",
        "display": "Heart valve replacement"
      }
    ]
  }
],
"kind": "ProcedureRequest",
"code": {
  "coding": [
    {
      "system": "http://snomed.info/sct",
      "code": "34068001",
      "display": "Heart valve replacement"
    }
  ]
},
"timingTiming": {
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/cqif-cqlExpression",
      "valueString": "Now()"
    }
  ]
},
"location": {
  "reference": "Location/1"
},
"participant": [
  {
    "type": "practitioner",
    "role": {
      "coding": [
        {
          "system": "http://nucc.org/provider-taxonomy",
          "code": "207RI0011X",
          "display": "Interventional Cardiology"
        }
      ],
      "text": "Interventional Cardiology"
    }
  }
],
"bodySite": [
  {
    "coding": [
      {
        "system": "http://snomed.info/sct",
        "code": "17401000",
        "display": "Heart valve structure"
      }
    ]
  }
]

}