<ActivityDefinition xmlns="http://hl7.org/fhir"><id value="heart-valve-replacement"/><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"><valueCode value="cds"/></extension><status value="draft"/><publisher value="HL7 International / Clinical Decision Support"/><contact><telecom><system value="url"/><value value="http://www.hl7.org/Special/committees/dss"/></telecom></contact><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"/><expression value="Now()"/></valueExpression></extension></event></timingTiming><location><reference><reference value="Location/1"/></reference></location><participant><type value="practitioner"/><role><coding><system value="http://nucc.org/provider-taxonomy"/><code value="207RI0011X"/><display value="Interventional Cardiology Physician"/></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>