Version 2.78

Descriptions

The coronary artery segmentation model published in 1975 by the American Heart Association (AHA) divides the coronary arteries into 15 segments for the purposes of evaluating and treating coronary artery disease. The diseased area(s) (also called "lesion") can be described in terms of the specific coronary segments where each lesion starts and ends. This model is still used as of 2015, with modifications by different disciplines.

The 15 AHA segments are defined as follows: 1) proximal right coronary artery; 2) mid right coronary artery; 3) distal right coronary artery; 4) posterior descending branch of right coronary artery; 5) left main coronary artery; 6) proximal left anterior descending artery; 7) mid left anterior descending artery; 8) distal left anterior descending artery; 9) first diagonal branch; 10) second diagonal branch; 11) proximal left circumflex artery; 12) obtuse marginal artery; 13) mid distal left circumflex; 14) posterolateral branch of left circumflex artery; and 15) posterior descending branch of left circumflex artery. PMID: 1116248 The 16 segment model is a modified version of the 15-segment AHA model and adds the intermediate branch artery (ramus intermedius), which originates from the left main coronary artery between the left anterior descending and left circumflex in cases of trifurcation, as segment 16. PMID: 21232704 An individual patient may not have the exact coronary segments described by this model and may have missing and/or additional segments, which can be evaluated by procedures such as angiography. Depending on the context, the AHA segments may be further subdivided in order to provide finer anatomic granularity. Source: Regenstrief LOINC

The coronary artery branch, lesion or stent start and end segment positions specify a more precise location within a given segment, and the start and end coordinates specify the combined segment/segment position information. For example, in one model, each segment of the coronary artery, which segments are defined by the American Heart Association (AHA), is divided into ten parts, numbered 0 to 9. The start location of a specific branch, lesion or stent placement is represented as:
Start segment: {AHA segment name/number}
Start segment position: {0-9}
Start coordinates: {AHA segment name/number}-{position 0-9}
The lesion's end location is specified following the same format, as is the location of an additional branch in cases where a lesion is present at a significant artery bifurcation and which itself bifurcates. Source: Regenstrief LOINC

Basic Part Properties

Part Display Name
Lesion end segment
Part Type
Component (Describes the core component or analyte measured)
Created On
2015-09-11
Construct for LOINC Short Name
Lesion end seg

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=LP200297-2

Language Variants Get Info

Tag Language Translation
zh-CN Chinese (China) 病变结束段
Synonyms: 病变（病灶、损伤、损害）结束段（节段）;病变末段
it-IT Italian (Italy) Lesione del tratto finale