<?xml version="1.0" encoding="UTF-8"?><ActivityDefinition xmlns="http://hl7.org/fhir">
  <id value="heart-valve-replacement"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
    </div>
  </text>
  <status value="draft"/>
  <description value="Heart valve replacement"/>
  <useContext>
    <code>
      <system value="http://terminology.hl7.org/CodeSystem/usage-context-type"/>
      <code value="age"/>
    </code>
    <valueCodeableConcept>
      <coding>
        <system value="https://meshb.nlm.nih.gov"/>
        <code value="D000328"/>
        <display value="Adult"/>
      </coding>
    </valueCodeableConcept>
  </useContext>
  <useContext>
    <code>
      <system value="http://terminology.hl7.org/CodeSystem/usage-context-type"/>
      <code value="user"/>
    </code>
    <valueCodeableConcept>
      <coding>
        <system value="http://snomed.info/sct"/>
        <code value="309343006"/>
        <display value="Physician"/>
      </coding>
    </valueCodeableConcept>
  </useContext>
  <purpose value="Describes the proposal to perform a Heart Valve replacement."/>
  <usage value="This activity definition is used as the definition of a service 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."/>
  <topic>
	<coding> 
		<system value="http://snomed.info/sct"/> 
		<code value="34068001"/> 
		<display value="Heart valve replacement"/> 
	</coding> 
  </topic>
  <kind value="ServiceRequest"/>
    <code> 
        <coding> 
            <system value="http://snomed.info/sct"/> 
            <code value="34068001"/> 
            <display value="Heart valve replacement"/> 
        </coding> 
    </code>
  <timingTiming>
    <event>
      <extension url="http://hl7.org/fhir/StructureDefinition/cqf-expression">
        <valueExpression>
          <language value="text/cql"/>
          <expression value="Now()"/>
        </valueExpression>
      </extension>
    </event>
  </timingTiming>
  <location>
    <reference value="Location/1"/>
  </location>
  <participant>
	<type value="practitioner"/>
	<role>
	  <coding>
	    <system value="http://nucc.org/provider-taxonomy"/>
	    <code value="207RI0011X"/>
	    <display value="Interventional Cardiology"/>
	  </coding>
	  <text value="Interventional Cardiology"/>
	</role>
  </participant>
    <bodySite> 
		<coding> 
			<system value="http://snomed.info/sct"/> 
			<code value="17401000"/> 
			<display value="Heart valve structure"/> 
		</coding>  
    </bodySite>
</ActivityDefinition>