HIGH-SPEED APPROACH FOR DELINEATING P AND T WAVES CHARACTERISTICS IN ELECTROCARDIOGRAM SIGNAL

Journal article

Authors / Editors

Yahya, Abid

Research Areas

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Publication Details

Author list: Salih SK, Aljunid SA, Aljunid SM, Maskon O, Yahya A

Publisher: World Scientific Publishing

Place: SINGAPORE

Publication year: 2014

Journal: Journal of Mechanics in Medicine and Biology (0219-5194)

Journal acronym: J MECH MED BIOL

Volume number: 14

Issue number: 2

Number of pages: 25

ISSN: 0219-5194

eISSN: 1793-6810

Languages: English-Great Britain (EN-GB)

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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.

Keywords

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

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