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Electrocardiogram signal preprocessing for automatic detection of QRS boundaries

1999; Elsevier BV; Volume: 21; Issue: 1 Linguagem: Inglês

10.1016/s1350-4533(99)00016-8

1873-4030

Ivan Daskalov, Ivaylo Christov,

Analytical Chemistry and Sensors

Automatic detection of QRS onset and offset points with reasonable accuracy has been a difficult task, approached since the first attempts at computerised electrocardiogram interpretation. The problem is additionally complicated by the usual presence of power-line interference, electromyogram artefacts and baseline fluctuation in the original signal, especially in multiphase complexes with small q, r, r′, or s′ waves. We propose a preprocessing method guaranteeing accurate preservation of the QRS boundaries, even in the existence of strong power-line or electromyogram noise. Examples of detection of QRS onset and offset points and a comparison with observer markings are presented for the assessment of preprocessing efficiency and detection consistency.