1. Copyright © 2001 College of American Pathologists Sample Hierarchy for Acute MI Acute MI of lateral wall Acute MI of apical-lateral wall Acute Myocardial Infarction Acute MI of basal-lateral wall Acute MI of high lateral wall About SNOMED Relationships

2. Copyright © 2001 College of American Pathologists Relationships for Acute MI of Lateral Wall (57054005) Acute myocardial infarction (58612006) Acute MI of lateral wall Is a (55470003) Acute infarct Associated morphology (41801008) Coronary artery structure Has finding site (273000) Structure of Lateral myocardium Has finding site

3. Copyright © 2001 College of American Pathologists Relationships for Acute MI of Apical-Lateral Wall (58612006) Acute MI of lateral wall (59063002) Acute MI of apical-lateral wall Is a (55470003) Acute infarct Associated morphology (41801008) Coronary artery structure Has finding site (273000) Structure of lateral myocardium (47962008) Myocardium of apex of heart Has finding site Has finding site

4. Copyright © 2001 College of American Pathologists Concept Inter-relationships for Disorders SNOMED CT uses relationships between concepts to provide logical, computer readable definitions of medical concepts. These relationships, which can be either hierarchical or non-hierarchical, enable health data to be re- used for decision support, outcomes analysis and clinical research. Follow this link to see the relationship types applicable to finding and disorders. relationship types

5. Copyright © 2001 College of American Pathologists Relationship Types for Disorders Clinical Attributes Finding Site Causative Agent Associated Morphology Laterality Hierarchical Is a

6. Copyright © 2001 College of American Pathologists The “Is a” Relationship The “Is a” relationship is used to create a hierarchical relationships between concepts, relating specific concepts to a more general category. For example: “Ischemic heart disease” “Is a” (kind of) “Myocardial disease”

7. Copyright © 2001 College of American Pathologists The “Finding site” Relationship The “Finding site” relationship identifies the part of the body affected by the specific disorder or finding. For example: “Myocardial Infarction” (has) “Finding site” “Myocardium”

8. Copyright © 2001 College of American Pathologists The “Causative agent” Relationship The “Causative agent” relationship identifies the direct cause of the disorder or finding. The causative agent is the bacterium, virus, toxin or environmental agent that causes the disorder. For example: “Rheumatic heart disease” (has) “Causative agent” “Streptococcus”

9. Copyright © 2001 College of American Pathologists The “Associated morphology” Relationship The “Associated morphology” relationship identifies the abnormal physical condition that is characteristic of a given disorder or finding. For example: “Acute MI” (has) “Associated morphology” “Acute infarct”

10. Copyright © 2001 College of American Pathologists The “Laterality” Relationship The laterality relationship specifies the side of the body that applies to an anatomy concept. Procedures, findings and disorders can have laterality by qualifying their site (procedure-site or finding-site). For example: “Left kidney” (has) “Laterality” “Left” “Cyst of left kidney” (has) “Finding site” “Left Kidney” “Biopsy of left kidney” (has) “Procedure site” “Left Kidney”