{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "method to measure the mass of the Left Ventricle via the ASE area-length method at end diastole. LV Mass = 1.05*(5/6*(A1*(L+t)) - 5/6*(A2*L)) A1 = Left Ventricle epicardial SAX area at the level of the papillary muscle tips at end diastole. A2 = Left Ventricle endocardial SAX area cavity area at the level of the papillary muscle tips at end diastole. L = Left Ventricle apical view long axis length at end diastole. t = Myocardial thickness can be computed as: t = sqrt (A1/3.14) - sqrt (A2/3.14) Reference: 1) Schiller, N.B., et al. \\\"Recommendations for Quantification of the LV by Two-dimensional Echocardiography.\\\" J Am Soc Echo, Vol. 2, No. 5: 358-367, Sep-Oct 1989. 2) Reichek, N., et al. \\\"Anatomic Validation of Left Ventricular Mass Estimates from Clinical Two-dimensional Echocardiography: Initial Results.\\\" Circulation, Vol. 67, No. 2: 348-52, February 1983",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "b1ec5bbe-140f-5223-8c53-9936392aea22",
  "ancestors" : {
    "125270" : 0
  },
  "id" : "4c6066fb-4c20-48c6-9e57-9743ad282a02",
  "code" : "125270",
  "display" : "Left Ventricle Mass by Area Length",
  "version" : "01"
}