Left ventricular Myocardial mass/Body surface area [Mass/Area] by US.2D+Calculated by truncated ellipsoid method 77899-3
LOINC Code
| LOINC code | 77899-3 | ||
|---|---|---|---|
| name | Left ventricular Myocardial mass/Body surface area [Mass/Area] by US.2D+Calculated by truncated ellipsoid method | ||
| description | The myocardial index is the left ventricular (LV) mass normalized for body size, which can be approximated by different measures including body surface area (BSA) and height. This term represents a BSA-based index. BSA can be calculated by a number of methods including the Mostellar and Du Bois formulas, or in some cases the average adult BSA, 1.73 m2, is used by default. Left ventricular mass calculated by the truncated ellipsoid formula on 2D ultrasound is as follows: 1.05 * Pi * {(b+t)^2 * [2/3 * (a+t)+d-d^3/(3 * (a+t))^2] - b^2 * [2/3 * a + d - d^3/(3 * a^2)]}, where a = distance from the minor axis to the endocardium at the LV apex, b = LV minor radius, t = mean wall thickness, and d = distance from the minor axis to the mitral valve plane. [PMID: 25559473] | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Myocardial mass/Body surface area | ||
| property | ArMass = Mass/Area | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Heart.ventricle.left | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | US.2D+Calculated by truncated ellipsoid method | ||
Additional Names | |||
| short name | LV Myo mass/BSA US.2D+trunc ellips | ||
Basic Attributes | |||
| class | CARD.US | ||
| type | 2 Clinical | ||
| order vs. observation | Observation | ||
| formula (readable) | Myocardial index = Left ventricular mass/Body surface area | ||
| example UCUM units | g/m2 The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | g/m2 | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
History/Usage | |||
| first released | |||
| last updated | 2.54 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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