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Development of QRS detection algorithm designed for wearable cardiorespiratory system

Authors
Journal
Computer Methods and Programs in Biomedicine
0169-2607
Publisher
Elsevier
Publication Date
Volume
93
Issue
1
Identifiers
DOI: 10.1016/j.cmpb.2008.07.010
Keywords
  • Qrs Detection
  • Hrv
  • Rr Interval
  • Cardiorespiratory Belt Sensor
Disciplines
  • Computer Science

Abstract

Abstract An in-home sleep monitoring system was developed previously in our laboratory for monitoring electrocardiography (ECG) and respiratory signals. However, the ECG signal acquired with this system is prone to high-grade noise caused by motion artifact. Since the detection of the QRS complexes with high accuracy is very important in a computer-based analysis of the ECG, a high accuracy QRS detection algorithm is developed and based on the combination of heart rate indicators and morphological ECG features. The proposed algorithm is tested both on 16 h data acquired using the two sensors of our cardiorespiratory belt system, i.e., the polyvinylidene fluoride (PVDF) film and the conductive fabric sheets, and on all 48 records of the MIT/BIH Arrhythmia Database. Satisfying results are obtained for both databases, the sensitivity S e and positive predictivity P + were calculated for each case and results show S e = [96.98%, 93.76%] and P + = [97.81%, 99.48%] for conductive fabric and PVDF film sensors, respectively, and S e = 99.77% and P + = 99.64% in the case of the MIT/BIH Arrhythmia Database. Further, heart rate variability (HRV) measures were calculated using our system and a commercial system. A comparison between systems’ results is done to show the usefulness of our developed algorithm used with our cardiorespiratory belt sensor.

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