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QRS micro-fragmentation as a mortality predictor

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F65269705%3A_____%2F22%3A00076407" target="_blank" >RIV/65269705:_____/22:00076407 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/00216224:14110/22:00127066

  • Výsledek na webu

    <a href="https://academic.oup.com/eurheartj/article/43/40/4177/6533247" target="_blank" >https://academic.oup.com/eurheartj/article/43/40/4177/6533247</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/eurheartj/ehac085" target="_blank" >10.1093/eurheartj/ehac085</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    QRS micro-fragmentation as a mortality predictor

  • Popis výsledku v původním jazyce

    Aims Fragmented QRS complex with visible notching on standard 12-lead electrocardiogram (ECG) is understood to represent depolarization abnormalities and to signify risk of cardiac events. Depolarization abnormalities with similar prognostic implications likely exist beyond visual recognition but no technology is presently suitable for quantification of such invisible ECG abnormalities. We present such a technology. Methods and results A signal processing method projects all ECG leads of the QRS complex into optimized three perpendicular dimensions, reconstructs the ECG back from this three-dimensional projection, and quantifies the difference (QRS &apos;micro&apos;-fragmentation, QRS-mu f) between the original and reconstructed signals. QRS &apos;micro&apos;-fragmentation was assessed in three different populations: cardiac patients with automatic implantable cardioverter-defibrillators, cardiac patients with severe abnormalities, and general public. The predictive value of QRS-mu f for mortality was investigated both univariably and in multivariable comparisons with other risk factors including visible QRS &apos;macro&apos;-fragmentation, QRS-Mf. The analysis was made in a total of 7779 subjects of whom 504 have not survived the first 5 years of follow-up. In all three populations, QRS-mu f was strongly predictive of survival (P &lt; 0.001 univariably, and P &lt; 0.001 to P = 0.024 in multivariable regression analyses). A similar strong association with outcome was found when dichotomizing QRS-mu f prospectively at 3.5%. When QRS-mu f was used in multivariable analyses, QRS-Mf and QRS duration lost their predictive value. Conclusion In three populations with different clinical characteristics, QRS-mu f was a powerful mortality risk factor independent of several previously established risk indices. Electrophysiologic abnormalities that contribute to increased QRS-mu f values are likely responsible for the predictive power of visible QRS-Mf. Key question The cardiac risk associated with visually diagnosed QRS fragmentation suggests that important QRS abnormalities might exist below the resolution of visual detection. Nevertheless, at present, little possibility exists to detect &apos;invisible&apos; abnormalities of myocardial depolarization. Key finding QRS &apos;micro-fragmentation&apos;, QRS- analysis quantifies &apos;invisible&apos; abnormalities of myocardial depolarization. It was found to independently predict death in three different populations of a total of 7779 subjects of whom 504 have not survived the first 5 years of follow-up. Take-home message QRS-mu f is a strong predictor of worsened survival. It can be assessed in standard short-term 12-lead electrocardiograms.

  • Název v anglickém jazyce

    QRS micro-fragmentation as a mortality predictor

  • Popis výsledku anglicky

    Aims Fragmented QRS complex with visible notching on standard 12-lead electrocardiogram (ECG) is understood to represent depolarization abnormalities and to signify risk of cardiac events. Depolarization abnormalities with similar prognostic implications likely exist beyond visual recognition but no technology is presently suitable for quantification of such invisible ECG abnormalities. We present such a technology. Methods and results A signal processing method projects all ECG leads of the QRS complex into optimized three perpendicular dimensions, reconstructs the ECG back from this three-dimensional projection, and quantifies the difference (QRS &apos;micro&apos;-fragmentation, QRS-mu f) between the original and reconstructed signals. QRS &apos;micro&apos;-fragmentation was assessed in three different populations: cardiac patients with automatic implantable cardioverter-defibrillators, cardiac patients with severe abnormalities, and general public. The predictive value of QRS-mu f for mortality was investigated both univariably and in multivariable comparisons with other risk factors including visible QRS &apos;macro&apos;-fragmentation, QRS-Mf. The analysis was made in a total of 7779 subjects of whom 504 have not survived the first 5 years of follow-up. In all three populations, QRS-mu f was strongly predictive of survival (P &lt; 0.001 univariably, and P &lt; 0.001 to P = 0.024 in multivariable regression analyses). A similar strong association with outcome was found when dichotomizing QRS-mu f prospectively at 3.5%. When QRS-mu f was used in multivariable analyses, QRS-Mf and QRS duration lost their predictive value. Conclusion In three populations with different clinical characteristics, QRS-mu f was a powerful mortality risk factor independent of several previously established risk indices. Electrophysiologic abnormalities that contribute to increased QRS-mu f values are likely responsible for the predictive power of visible QRS-Mf. Key question The cardiac risk associated with visually diagnosed QRS fragmentation suggests that important QRS abnormalities might exist below the resolution of visual detection. Nevertheless, at present, little possibility exists to detect &apos;invisible&apos; abnormalities of myocardial depolarization. Key finding QRS &apos;micro-fragmentation&apos;, QRS- analysis quantifies &apos;invisible&apos; abnormalities of myocardial depolarization. It was found to independently predict death in three different populations of a total of 7779 subjects of whom 504 have not survived the first 5 years of follow-up. Take-home message QRS-mu f is a strong predictor of worsened survival. It can be assessed in standard short-term 12-lead electrocardiograms.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    30201 - Cardiac and Cardiovascular systems

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2022

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    European Heart Journal

  • ISSN

    0195-668X

  • e-ISSN

    1522-9645

  • Svazek periodika

    43

  • Číslo periodika v rámci svazku

    40

  • Stát vydavatele periodika

    GB - Spojené království Velké Británie a Severního Irska

  • Počet stran výsledku

    15

  • Strana od-do

    4177-4191

  • Kód UT WoS článku

    000758231400001

  • EID výsledku v databázi Scopus

    2-s2.0-85138245396