Uncertainty principle of signal-averaged electrocardiography
| Autor: | Sridevi Challapalli, Alan H. Kadish, Shmuel Inbar, David A. Johnson, Jeffrey J. Goldberger, Mirza W. Ahmed, Michael Waligora |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Adult
Male Reproducibility medicine.medical_specialty medicine.diagnostic_test business.industry Reproducibility of Results Residual noise Signal-averaged electrocardiogram Signal-averaged electrocardiography Surgery QRS complex Noise Electrocardiography Physiology (medical) Internal medicine Cardiology Medicine Humans Female Noise level Cardiology and Cardiovascular Medicine business Artifacts |
| Zdroj: | Circulation. 101(25) |
| ISSN: | 1524-4539 |
| Popis: | Background —Signal-averaged ECG (SAECG) reproducibility is reported to have a component that is independent of residual noise. Methods and Results —In group 1, multiple paired SAECGs were obtained to noise levels of 0.3±0.1 and 0.5±0.2 μV. For the 0.5- and 0.3-μV noise recordings, QRS duration (QRSd) was 101.2±11.3 and 104.6±9.6 ms, respectively ( P 2 ( P 2 ( P Conclusions —Within the acceptable noise range for SAECG, lower noise results in longer QRSd and larger variance, suggesting that more accurate recordings may have less reproducibility. The random timing of noise relative to signal results in the distribution/variance of repeated measurements. Statistical strategies may be used to reduce some of this variance and may enhance the diagnostic utility of SAECG. |
| Databáze: | OpenAIRE |
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