The derivation of the spatial QRS-T angle and the spatial ventricular gradient using the Mason-Likar 12-lead electrocardiogram.
Research has shown that the 'spatial QRS-T angle' (SA) and the 'spatial ventricular gradient' (SVG) have clinical value in a number of different applications. The determination of the SA and the SVG requires vectorcardiographic data. Such data is seldom recorded in clinical practice. The SA and the...
| Published in: | Journal of Electrocardiology Vol. 48; no. 6; pp. 1045 - 1053 |
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| Main Authors: | , , , , , , |
| Format: | research Journal Article |
| Published: |
W B Saunders
Nov/Dec2015
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=110532627&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 110532627 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00220736 1276 jtl: Journal of Electrocardiology issn: 00220736 maglogo: N pubinfo: dt: Nov/Dec2015 vid: 48 iid: 6 pid: 1351 pub: W B Saunders place: Philadelphia, Pennsylvania artinfo: ui: 110532627 110532627 NLM26381798 110532627 10.1016/j.jelectrocard.2015.08.009 NLM26381798 110532627 ppf: 1045 ppct: 8 formats: tig: atl: The derivation of the spatial QRS-T angle and the spatial ventricular gradient using the Mason-Likar 12-lead electrocardiogram. aug: au: Guldenring, Daniel Finlay, Dewar D. Bond, Raymond R. Kennedy, Alan McLaughlin, James Galeotti, Loriano Strauss, David G. affil: Ulster University, Belfast, United Kingdom sug: subj: Arrhythmia Diagnosis Arrhythmia Physiopathology Diagnosis, Computer Assisted Methods Heart Conduction System Physiopathology Heart Ventricle Physiopathology Body Surface Potential Mapping Methods Statistics Methods Reproducibility of Results Models, Biological Sensitivity and Specificity Computer Simulation Human ab: Research has shown that the 'spatial QRS-T angle' (SA) and the 'spatial ventricular gradient' (SVG) have clinical value in a number of different applications. The determination of the SA and the SVG requires vectorcardiographic data. Such data is seldom recorded in clinical practice. The SA and the SVG are therefore frequently derived from 12-lead electrocardiogram (ECG) data using linear lead transformation matrices. This research compares the performance of two previously published linear lead transformation matrices (Kors and ML2VCG) in deriving the SA and the SVG from Mason-Likar (ML) 12-lead ECG data. This comparison was performed through an analysis of the estimation errors that are made when deriving the SA and the SVG for all 181 subjects in the study population. The estimation errors were quantified as the systematic error (mean difference) and the random error (span of the Bland-Altman 95% limits of agreement). The random error was found to be the dominating error component for both the Kors and the ML2VCG matrix. The random error [ML2VCG; Kors; result of the paired, two-sided Pitman-Morgan test for statistical significance of differences in the error variance between ML2VCG and Kors] for the vectorcardiographic parameters SA, magnitude of the SVG, elevation of the SVG and azimuth of the SVG were found to be [37.33°; 50.52°; p<0.001], [30.17mVms; 39.09mVms; p<0.001], [36.77°; 47.62°; p=0.001] and [63.45°; 80.32°; p<0.001] respectively. The findings of this research indicate that in comparison to the Kors matrix the ML2VCG provides greater precision for estimating the SA and SVG from ML 12-lead ECG data. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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