High-speed approach for delineating p and t waves characteristics in electrocardiogram signal

Sameer K. Salih, S. A. Aljunid, Syed Mohamed Al-Junid Syed Junid, Oteh Maskon, Abid Yahya

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Identifying and delineating P and T wave characteristics are greatly important in interpreting and diagnosing electrocardiogram (ECG) signals. P and T waves with high accuracy are more difficult to delineate because of their various shapes, positions, directions and boundaries. This paper proposes a high-speed approach to delineate P and T waves in a single lead using two high-speed algorithms of high detection accuracy. This approach presents a simple, adaptive and intelligent P and T wave scan method that determines the onset, peak and end time locations within an adaptive period appointed by previous records of the QRS complex. By using a translating (rising to/from falling) interval inside the scan wave, the peak time location of P and T waves and the T wave sign (upward or downward) are determined. Continuously, this time location is considered a reference point for determining the onset and the end time locations based on a series of computed outcomes related to amplitude and slope difference. The new approach is validated by 105 annotated records from the QT database collected from seven different categories of ECG signals. Simulation results show that the average detection rates of sensitivity and positive predictivity are equal to 99.97% and 99.36% for P wave and 99.98% and 99.26% for T wave, respectively. The average time errors computed by the mean and standard deviation for the P wave onset, peak and end time locations are -3.00 ± 2.94, -0.69 ± 4.42 and 0.67 ± 4.56 ms, respectively. The values for T wave are -3.33 ± 4.96, 0.24 ± 5.36 and -0.36 ± 5.68 ms. Results demonstrate the reliability, accuracy and forcefulness of the proposed approach in delineating various categories of P and T waves.

Original languageEnglish
Article number1430003
JournalJournal of Mechanics in Medicine and Biology
Volume14
Issue number2
DOIs
Publication statusPublished - Apr 2014
Externally publishedYes

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Electrocardiography
Lead

Keywords

  • ECG delineation
  • onset peak and end detection
  • P and T waves
  • QT database
  • time locations

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

High-speed approach for delineating p and t waves characteristics in electrocardiogram signal. / Salih, Sameer K.; Aljunid, S. A.; Syed Junid, Syed Mohamed Al-Junid; Maskon, Oteh; Yahya, Abid.

In: Journal of Mechanics in Medicine and Biology, Vol. 14, No. 2, 1430003, 04.2014.

Research output: Contribution to journalArticle

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abstract = "Identifying and delineating P and T wave characteristics are greatly important in interpreting and diagnosing electrocardiogram (ECG) signals. P and T waves with high accuracy are more difficult to delineate because of their various shapes, positions, directions and boundaries. This paper proposes a high-speed approach to delineate P and T waves in a single lead using two high-speed algorithms of high detection accuracy. This approach presents a simple, adaptive and intelligent P and T wave scan method that determines the onset, peak and end time locations within an adaptive period appointed by previous records of the QRS complex. By using a translating (rising to/from falling) interval inside the scan wave, the peak time location of P and T waves and the T wave sign (upward or downward) are determined. Continuously, this time location is considered a reference point for determining the onset and the end time locations based on a series of computed outcomes related to amplitude and slope difference. The new approach is validated by 105 annotated records from the QT database collected from seven different categories of ECG signals. Simulation results show that the average detection rates of sensitivity and positive predictivity are equal to 99.97{\%} and 99.36{\%} for P wave and 99.98{\%} and 99.26{\%} for T wave, respectively. The average time errors computed by the mean and standard deviation for the P wave onset, peak and end time locations are -3.00 ± 2.94, -0.69 ± 4.42 and 0.67 ± 4.56 ms, respectively. The values for T wave are -3.33 ± 4.96, 0.24 ± 5.36 and -0.36 ± 5.68 ms. Results demonstrate the reliability, accuracy and forcefulness of the proposed approach in delineating various categories of P and T waves.",
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