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Part Description

LP230000-4   Phase entropy
Phase analysis of the timing of myocardial contraction is used in nuclear cardiology to quantify regional ventricular wall motion and evaluate certain conditions, including bundle branch block, ventricular pacing, and pre-excitation syndromes. Phase and amplitude together are used to classify wall motion, which is also a measure of cardiac dyssynchrony.
The phase value is defined as the amount of shift in the sine or cosine curve (measured in degrees) using the fundamental frequency of the Fourier fitting, and all of the individual phase values are used together to create a phase histogram in order to see the distribution pattern of phase values. Separate histograms are created for the rest and stress portions of the study.
Multiple parameters are calculated from the histogram:
1. Phase maximum (degrees);
2. Phase mean (degrees);
3. Phase standard deviation (degrees);
4. Phase bandwidth, which is defined as 95% of the histogram width (degrees); and
5. Phase entropy, which is an index of disorder reported on a scale of 0-1 (0-100%), with 0 meaning complete order and 1 meaning complete disorder.
PMID: 26860109 Source: Regenstrief LOINC, PMID: 26860109

LOINC Names Get Info

Fully-Specified Name
Phase entropy^W stress:Score:Pt:Heart.ventricle.left:Qn:NM.SPECT
Long Common Name
Phase entropy [Score] Left ventricle SPECT --W stress
Short Name
Phase entropy W Stress Scre LV SPECT

Part Model Get Info

  • Component
    Phase entropy^W stress
    LP304537-6
    • Analyte
      Phase entropy
      LP230000-4
      • Component Numerator
        Phase entropy
        LP230000-4
        • Component Numerator Core
          Phase entropy
          LP230000-4
        • Component Numerator Core Suffix
          NULL
           
      • Component Denominator
        NULL
         
        • Component Denominator Core
          NULL
           
        • Component Denominator Core Suffix
          NULL
           
    • Challenge
      W stress
      LP36546-7
    • Adjustment
      NULL
       
    • Count
      NULL
       
  • Property
    Score
    LP185820-0
  • 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
    NM.SPECT
    LP208656-1

Basic Attributes

Class
CARD.PROC
Type
Clinical
First Released
Version 2.58
Last Updated
Version 2.82 (MIN)
Order vs. Observation
Observation

Member of these Panels

LOINCLong Common Name
82654-5Cardiac nuclear imaging SPECT panel

Language Variants Get Info

TagLanguageTranslation
el-GRGreek (Greece)Εντροπία φάσης^Με κόπωση:Βαθμολογία:Pt:Καρδιά.κοιλία.αριστερή:Qn:NM.SPECT
Synonyms: CARD.PROC NM NM.SPECT Pt Qn Βαθμολογία Εντροπία φάσης Καρδιά Καρδιά.κοιλία Καρδιά.κοιλία.αριστερή Με κόπωση
es-MXSpanish (Mexico)Entropía de fase ^ W estrés:Puntaje:Punto temporal:Corazón.ventrículo.izquierdo:Cuantitativo:NM.SPECT
it-ITItalian (Italy)Fase di entropia^Sotto sforzo:Punteggio:Pt:Cuore.ventricolo.sinistro:Qn:NM.SPECT
Synonyms: Procedure cardiache Punto nel tempo (episodio) SPECT Ventricolo cardiaco Ventricolo cardiaco Sinistro
zh-CNChinese (China)相位熵^采用应激:评分:时间点:心脏.心室.左侧:定量型:NM.SPECT
Synonyms: L LT W 应激;W 负荷;W 运动;采用负荷;采用运动 分值;得分;分数 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 心脏病学 时刻;随机;随意;瞬间 核医学方法;核医学设备;nuclear medicine 核医学方法;核医学设备;nuclear medicine;单光子发射计算机断层扫描;single photon emission computed tomography;SPECT;单光子发射计算机断层显像;单光子发射断层扫描;发射计算机断层术;放射性核素扫描;同位素发射计算机辅助断层显像;Emission Computed tomography;ECT 相位（时相、相、期、分期、时段）熵（熵值、紊乱程度、有序程度、无序程度） 采用负荷

Example Units

UnitSource
{score}Example UCUM Units

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=82630-5