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Three methods for determining the respiratory waves from ECG (Part II)

Szmajda Mirosław, Chyliński Mirosław, Sacha Jerzy, Mroczka Janusz

Metrology and Measurement Systems

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2024

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Vol. 31, nr 1

51--71

EN

This paper presents the results of a study of three methods for estimating the respiratory wave (RW) and respiratory rate (RR) using the electrocardiogram (ECG). There were applied methods from different groups: amplitude modulation ECG-Derived Respiration (EDR), frequency modulation Respiratory Sinus Arrhythmia (RSA) and Baseline Wander (BW) processing with the Savitzky-Golay filter (S-G). The theoretical aspects of the methods were presented in the Part 1 of the publication which was entitled: “Three Methods for the Determination of the Respiratory Waves from ECG Part I”. RR parameter estimation was performed for all the three methods for 12 subjects. The research concerning the influence of the parameters: Body Mass Index (BMI), Tidal Volume (TV) -, Forced Expiratory Volume in 1 second (FEV1) and - Forced Vital Capacity (FVC) on the errors of the estimated parameter RR. Moreover, all 12 signals, which were acquired with the help of a 12-lead Holter ECG were taken into consideration. The results indicate a preliminary dependence of respiratory parameters and BMI on the Respiratory Wave and, further, on the RR estimation errors. Consequently, the type of method and ECG Holter leads depend on the BMI and respiratory parameters. Studies with larger numbers of objects to definitively confirm these relationships are planned. In addition, an optimal selection of S-G filter parameters was carried out. Finally, a proprietary reference embedded system for recording RW and calculating RR was demonstrated.

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Correlation between linear and non-linear vibroartrographic parameters

Kręcisz Krzysztof, Bączkowicz Dawid, Łysiak Adam, Szmajda Mirosław, Kawala-Sterniuk Aleksandra

Przegląd Elektrotechniczny

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2023

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R. 99, nr 7

180--185

EN

In this paper the authors compared linear and non-linear features of the vibroarthrogram (VAG) in knee joint context. There were 220 healthy participants in the study, divided into five age-related groups (third, fourth, fifth, sixth and seventh decade of life). Four linear features (i.e. variance of the mean squares, amplitude, and two frequency parameters) and two non-linear features (i.e. multi-scale entropy and recurrence rate) were correlated with each other. Correlations within linear and non-linear groups proved to be positive, while inter-group correlations turn out to be negative. Also, in the context of age differentiation, recurrence rate feature proved to be the most informative one.

PL

W niniejszej pracy autorzy porównali liniowe i nieliniowe cechy wibroartrogramu (VAG) w kontekście stawu kolanowego. W badaniuwzięło udział 220 zdrowych uczestników, podzielonych na pięć grup wiekowych (trzecia, czwarta, piąta, szósta i siódma dekadażycia). Cztery cechy˙ liniowe (tj. wariancja średnich kwadratów, amplituda i dwa parametry częstotliwości) oraz dwie cechy nieliniowe (tj. wieloskalowa entropia i częstość nawrotów) były ze sobą skorelowane. Korelacje w obrębie grup liniowych i nieliniowych okazały się dodatnie, natomiast korelacje międzygrupowe okazały się ujemne. Również w kontekście zróżnicowania wieku cecha częstości nawrotów okazała się najbardziej informatywna.

3

Three methods for determining respiratory waves from ECG (Part I)

Szmajda Mirosław, Chyliński Mirosław, Sacha Jerzy, Mroczka Janusz

Metrology and Measurement Systems

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2023

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Vol. 30, nr 4

821--837

EN

In the diagnosis of many disease entities directly or indirectly related to disorders of respiratory parameters and heart disease, an important support would be to estimate the temporal changes in these parameters (most often respiratory wave (RW) and respiratory rate (RR)) on the basis the results of measurements of other physiological parameters of the patient. Such a possibility exists during ECG examination. The paper presents three methods for estimating RW and RR using ECG signal processing. The three procedures developed are shown: using Savitzky-Golay filtering (S-G), the ECG-Derived Respiration method (EDR) and the Respiratory Sinus Arrhythmia Analysis method (RSA). It must be clearly stated that the proposed methods are not designed to fully diagnose the patient’s respiratory function, but they can be applied to detect some conditions that are difficult to diagnose when performing an ECG, such as sleep-disordered breathing. The obtained results of the analysis were compared with those obtained from a dedicated measurement system developed by the authors. The second part of the paper will show the results of preliminary clinical verification of the developed analysis methods, taking into account the physiological parameters of the patient.

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Zastosowanie technologii cyfrowego przetwarzania sygnałów w nowoczesnych układach reograficznych

Szmajda Mirosław, Khoma Volodymyr, Khoma Yuriy, Otenko Viktor

Przegląd Elektrotechniczny

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2019

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R. 95, nr 11

233--239

PL

W pracy opisano sposób budowy układu reograficznego, bazującego na szerokim wykorzystaniu układów cyfrowych w celu zapewnienia stabilności parametrów toru pomiarowego oraz rozszerzenia jego funkcyjności. Nowe rozwiązanie dotyczy kompensacji oporu bazowego za pomocą potencjometru cyfrowego, cyfrowej syntezy kwadraturowych sygnałów pobudzenia oraz wykonania detekcji synchronicznej w postaci cyfrowej.

EN

This paper describes a method of rheographic system design, that is based on the wide use of digital components in order to ensure the stability of the measuring channel parameters as well as expanding its functionality. A novel approach concerns the compensation of the base resistance using a digital potentiometer, digital synthesis of quadrature probe signals and the implementation of synchronous detection in a digital form.

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Transformata Gabora-Wignera i transformacja falkowa – analizy w zastosowaniach monitoringu jakości energii elektrycznej

Górecki Krzysztof, Szmajda Mirosław, Mroczka Janusz

Zeszyty Naukowe. Informatyka / Politechnika Opolska

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2015

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vol. 357, z. 3

41--54

PL

W artykule tym zaprezentowano wykorzystanie dwóch metod przetwarzania sygnałów w analizie sygnału elektroenergetycznego. Przedstawiono dyskretną diadyczną transformację falkową i jej efektywność w detekcji i rekonstrukcji zakłóceń oraz transformatę Gabora-Wignera w analizie energii i lokalizacji na płaszczyźnie czas-częstotliwość.

EN

Two advanced digital signal processing methods in the power voltage waveforms processing were presented in the paper. There were introduced Discrete Dyadic Wavelet Transformation and its effectiveness in detection and reconstruction of voltage waveform disturbances. Moreover, Gabor-Wigner Transformation in analysis of signal energy and its localization on time-frequency plane, was also shown.