Journal
AUSTRALASIAN PHYSICAL & ENGINEERING SCIENCES IN MEDICINE
Volume 34, Issue 4, Pages 515-521Publisher
SPRINGER
DOI: 10.1007/s13246-011-0099-8
Keywords
Electrocardiogram (ECG); Myocardial ischemia (MI); QRS complex characters; Heart rate variability (HRV); QRS barycenter
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Funding
- Research Funds of China space medical engineering [SJ201006]
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Electrocardiogram (ECG) is an economic, convenient, and non-invasive detecting tool in myocardial ischemia (MI), and its clinical appearance is mainly exhibited by the changes in ST-T complex. Recently, QRS complex characters were proposed to analyze MI by more and more researchers. In this paper, various QRS complex characters were extracted in ECG signals, and their relationship was analyzed systematically. As a result, these characters were divided into two groups, and there existed good relationship among them for each group, while the poor relationship between the groups. Then these QRS complex characters were applied for statistical analysis on MI, and five characters had significant differences after ECG recording verification, which were: QRS upward and downward slopes, transient heart rate, angle R and angle Q. On the other hand, these QRS complex characters were analyzed in frequency domain. Experimental results showed that the frequency features of RR interval series (Heart Rate Variability, HRV), and QRS barycenter sequence had significant differences between MI states and normal states. Moreover, QRS barycenter sequence performed better.
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