Intersection of http://hl7.org/fhir/ValueSet/observation-codes and https://centrocardiovascular.cl/ValueSet/PreoperativeHeartRythmObservationVS
This is the ValueSet that contains codes in both LOINC Codes (http://hl7.org/fhir/ValueSet/observation-codes) and Ritmo del corazón en preoperación (https://centrocardiovascular.cl/ValueSet/PreoperativeHeartRythmObservationVS).