{
  "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"
        }
      ]
    }
  ]
}