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Term 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

Part Description

LP189364-5   US.2D+Calculated by truncated ellipsoid method
Two-dimensional (2D) imaging is one of three ultrasound modes (2D, M-mode, and Doppler) used for cardiac imaging. 2D imaging is the primary method of cardiac imaging and allows structures to be viewed moving in real time in a cross-section of the heart (two dimensions). It is used to detect abnormal anatomy or motion. The most common cross-sectional views are the parasternal long axis, the parasternal short axis, and the apical view. The gastric or subcostal and suprasternal views are also commonly used. [NCBI Books: NBK2215] Source: Regenstrief LOINC, NCBI Books: NBK2215

LOINC Names Get Info

Fully-Specified Name
Myocardial mass/Body surface area:ArMass:Pt:Heart.ventricle.left:Qn:US.2D+Calculated by truncated ellipsoid method
Long Common Name
Left ventricular Myocardial mass/Body surface area [Mass/Area] by US.2D+Calculated by truncated ellipsoid method
Short Name
LV Myo mass/BSA US.2D+trunc ellips

Part Model Get Info

  • Component
    Myocardial mass/Body surface area
    LP286598-0
    • Analyte
      Myocardial mass/Body surface area
      LP286598-0
      • Component Numerator
        Myocardial mass
        LP201888-7
        • Component Numerator Core
          Myocardial mass
          LP201888-7
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        Body surface area
        LP32004-1
        • Component Denominator Core
          Body surface area
          LP32004-1
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      NULL
       
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    ArMass
    LP200147-9
  • Time
    Pt
    LP6960-1
  • System
    Heart.ventricle.left
    LP7310-8
    • System Core
      Heart.ventricle.left
      LP7310-8
    • Super System
      NULL
       
  • Scale
    Qn
    LP7753-9
  • Method
    US.2D+Calculated by truncated ellipsoid method
    LP189364-5

Basic Attributes

Class
CARD.US
Type
Clinical
First Released
Version 2.52
Last Updated
Version 2.54 (MIN)
Order vs. Observation
Observation

Formula (Readable)

Myocardial index = Left ventricular mass/Body surface area

Language Variants Get Info

TagLanguageTranslation
el-GRGreek (Greece)Μάζα μυοκαρδίου/Επιφάνεια σώματος:ArMass:Pt:Καρδιά.κοιλία.αριστερή:Qn:Υπερηχογράφημα.2D+Υπολογιζόμενο με τη μέθοδο κόλουρου ελλειψοειδούς
Synonyms: ArMass CARD.US Pt Qn US.2D Επιφάνεια Επιφάνεια σώματος ΗΠΑ Καρδιά Καρδιά.κοιλία Καρδιά.κοιλία.αριστερή Μάζα μυοκαρδίου Υπερηχογράφημα.2D+Υπολογιζόμενο Υπερηχογράφημα.2D+Υπολογιζόμενο με τη μέθοδο κόλουρου ελλειψοειδούς Υπολογιζόμενο
es-MXSpanish (Mexico)Masa miocárdica / Área de superficie corporal:ArMass:Punto temporal:Corazón.ventrículo.izquierdo:Cuantitativo:US.2D+Calculated by truncated ellipsoid method
it-ITItalian (Italy)Massa miocardica/Area di superficie corporea:ArMass:Pt:Cuore.ventricolo.sinistro:Qn:Eco.2D+Cacolata da metodo ellisoide troncato
Synonyms: Eco Ecografia 2D Ecografia 2D.calcolata Ecografia cardiaca Punto nel tempo (episodio) Ventricolo cardiaco Ventricolo cardiaco Sinistro
zh-CNChinese (China)心肌质量/体表面积:质量/面积:时间点:心脏.心室.左侧:定量型:超声.2D+截断椭球计算法
Synonyms: BSA L LT 二维超声;二维超声检查;超声.二维;超声检查.2D;超声检查.二维 体表面积（Body surface area，BSA） 单位面积的质量 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 向左 向左侧 左 左侧（Left，LT，L） 左向 左心室;心.室.左侧;心.心室.左侧;心脏.室.左侧 左边 心 心.室;心.心室;心室;心脏.室 心肌重量;Myocardial mass;MM 心脏病学 心脏病学.超声;心脏超声 时刻;随机;随意;瞬间 物体 计算;计算型方法 超声.二维+截断椭球计算法 超声.二维+计算法 超声检查方法;超声检查法;超声波;超声波检查方法;超声波检查法 身体表面 身体表面积 身体表面面积;身体表面积;BSA 面;表层;上面;外表;表象;面上

Example Units

UnitSource
g/m2Example UCUM Units

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=77899-3