Wavelet packet-based detection of QRS complexes and study of QRS complex area to duration ratio.

摘要

QRS complex detection is performed on the first five minutes of all 48 electrocardiogram (ECG) signals of the MIT-BIH Arrhythmia database (17). A wavelet packet decomposition and compression algorithm optimized for a particular channel (MLII lead) in this database is used for detecting the QRS complex. On the MLII lead, the algorithm on average shows a sensitivity of 96.4% and a predictive value of a positive test of 98.1%. For three signals, other channels were analyzed and the average sensitivity was 92.5% and the average predictive value of a positive test was 95.8%.; To evaluate the hypothesis that the area to duration ratio of the QRS complex in normal heartbeat segments can be used as a predictor for arrhythmias, ECG's of healthy patients and the normal segment of ECG's of patients with arrhythmias were analyzed. It was found that the ratio does not seem to be a suitable predictor of abnormality for this data set.