Electrocardiographic Signal Broadband Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F24%3A00645722" target="_blank" >RIV/68081731:_____/24:00645722 - isvavai.cz</a>

Výsledek na webu

<a href="https://cinc.org/archives/2024/pdf/CinC2024-228.pdf" target="_blank" >https://cinc.org/archives/2024/pdf/CinC2024-228.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22489/CinC.2024.228" target="_blank" >10.22489/CinC.2024.228</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrocardiographic Signal Broadband Properties

Popis výsledku v původním jazyce

Background: Low, high, and ultra-high-frequency ECGs measure ventricular activation differently. However, their principles and properties have not yet been studied systematically. Method: 5 kHz ECG resting recordings were acquired in 134 subjects. We used an extended 12-lead ECG setup with 6 (V1-V6)+6 extended precordial leads. We measured the distance of all precordial leads to the ventricular geometrical center with the magnetic resonance images. We determined the amplitude of frequency components for each lead by computing the area of the averaged amplitude envelopes during the QRS complex. We used five frequency bands: LF (0.2-20 Hz), MF (20-80 Hz), HF (80-300 Hz), UHF1 (300-500 Hz), and UHF2 (800-1.000 Hz). Results: The relative amplitude decreases with relative distance from the myocardial depolarization source and significantly differs in frequencies. The decay coefficient in the LF band is more than two times lower than the UHF2 band coefficient. All differences between frequencies are significant p<0.005. Conclusion: Lower frequencies are more sensitive to distant areas, and higher frequencies are more sensitive to near regions. Combining multiple frequency bands has the potential to localize activation sources more precisely.

Název v anglickém jazyce

Electrocardiographic Signal Broadband Properties

Popis výsledku anglicky

Background: Low, high, and ultra-high-frequency ECGs measure ventricular activation differently. However, their principles and properties have not yet been studied systematically. Method: 5 kHz ECG resting recordings were acquired in 134 subjects. We used an extended 12-lead ECG setup with 6 (V1-V6)+6 extended precordial leads. We measured the distance of all precordial leads to the ventricular geometrical center with the magnetic resonance images. We determined the amplitude of frequency components for each lead by computing the area of the averaged amplitude envelopes during the QRS complex. We used five frequency bands: LF (0.2-20 Hz), MF (20-80 Hz), HF (80-300 Hz), UHF1 (300-500 Hz), and UHF2 (800-1.000 Hz). Results: The relative amplitude decreases with relative distance from the myocardial depolarization source and significantly differs in frequencies. The decay coefficient in the LF band is more than two times lower than the UHF2 band coefficient. All differences between frequencies are significant p<0.005. Conclusion: Lower frequencies are more sensitive to distant areas, and higher frequencies are more sensitive to near regions. Combining multiple frequency bands has the potential to localize activation sources more precisely.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20601 - Medical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Computing in Cardiology 2024 (CinC 2024)

ISBN

—

ISSN

2325-887X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

228

Název nakladatele

Computing in Cardiology

Místo vydání

Neuveden

Místo konání akce

Karlsruhe

Datum konání akce

8. 11. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—