[Effects of high-pass filters with different frequencies on signal-averaged electrocardiograms].
The results of the root mean square voltage of the terminal 40 ms (V40), the duration of the low amplitude signal of less than 20 muV (D40) and the duration of the signal-averaged QRS complex (QRSr) after high-pass filters with 5, 10, 15, 20, 25, 40, 80, 100, 150 and 200Hz were reported. The results showed that the signal-averaged electrocardiogram (SAECG) was highly influenced by the frequencies of the filter. According to the specificity and sensitivity after different high-pass filters, 25Hz was considered as the optimal high-pass filtering frequency.
Huang
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Cardiovascular Disease Institute, Tongji Medical University, Wuhan.
D000328:Adult; D000368:Aged; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D004562:Electrocardiography / Q000379:methods*; D004594:Electrophysiology; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000503:physiopathology*