Daskalov I K, Christov I I
Centre of Biomedical Engineering, Bulgarian Academy of Sciences, Sofia.
Med Eng Phys. 1999 Jan;21(1):37-44. doi: 10.1016/s1350-4533(99)00016-8.
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.
自首次尝试计算机化心电图解释以来，以合理的准确度自动检测QRS波起始点和终点一直是一项艰巨的任务。原始信号中通常存在的电力线干扰、肌电图伪迹和基线波动会使问题更加复杂，尤其是在具有小q波、r波、r'波或s'波的多相复合波中。我们提出一种预处理方法，即使在存在强电力线或肌电图噪声的情况下，也能保证准确保留QRS波边界。给出了QRS波起始点和终点检测的示例以及与观察者标记的比较，以评估预处理效率和检测一致性。
