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Assessment of QT-measurement accuracy using the 12-lead electrocardiogram derived from EASI leads.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Martínez, Juan Pablo Laguna, Pablo Olmos, Salvador Pahlm, Olle Pettersson, J. C. E. Sörnmo, Leif |
| Copyright Year | 2007 |
| Abstract | The purpose of the present study is to assess QT-interval measurements from the EASI 12-lead electrocardiogram (ECG) as compared with the standard 12-lead ECG. The QT interval was automatically determined in simultaneously recorded standard and EASI 12-lead ECGs, using a validated wavelet-based delineator. The agreement between the 2 sets of measurements was quantified both on a lead-by-lead basis and a multilead basis with global definitions of QRS onset and T-wave end. The results show that the agreement between QT-interval measurements from the 2 lead systems is acceptable, with negligible mean differences and with correlation coefficients ranging from 0.91 to 0.98 depending on the lead studied. Although the SD shows a clear dependence on the selected lead (ranging from 9.2 to 26.4 milliseconds), differences are within the accepted tolerances for automatic delineation. In a few patients, large differences were found, mainly because of changes in morphology present in both lead systems. QT intervals measured by the multilead approach were considerably more stable than single-lead measurements and resulted in a much better agreement between the 2 lead systems (correlation coefficient, 0.98; QT difference, 1.1 +/- 9.8 milliseconds). Thus, the EASI 12-lead ECG may be used for reliable QT monitoring when the multilead delineation approach is adopted. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jelectrocard.2006.08.089 |
| PubMed reference number | 17027840 |
| Journal | Medline |
| Volume Number | 40 |
| Issue Number | 2 |
| Alternate Webpage(s) | http://diec.unizar.es/~laguna/personal/publicaciones/QTeasi.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jelectrocard.2006.08.089 |
| Journal | Journal of electrocardiology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
