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- Sörnmo, Leif, et al.
(författare)
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Non-invasiv analys av förmaksflimmer
- 2006
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Ingår i: Elektrokardiologi : klinik och teknik. ; , s. 287-309
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Sörnmo, Leif, et al.
(författare)
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Signabehandling av EKG
- 2006
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Ingår i: Elektrokardiologi : klinik och teknik. ; , s. 17-40
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 8. |
- Martinez, J P, et al.
(författare)
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Accuracy of QT Measurement in the EASI-derived 12-lead ECG
- 2006
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Ingår i: Conference proceedings (IEEE Engineering in Medicine and Biology Society. Conf.). - 1557-170X. ; 1, s. 3986-3989
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Konferensbidrag (refereegranskat)abstract
- The purpose of this study is to assess QT interval measurements from the EASI 12-lead ECG as compared to the standard 12-lead ECG. The QT interval was automatically measured in simultaneously recorded standard and EASI 12- lead ECGs, using a validated wavelet-based delineator. The agreement between the two sets of measurements was quantified both on a lead-by-lead basis and a multilead basis. The results show an acceptable agreement between QT measurements in the two lead systems, with correlation coefficients (CC) 0.91-0.98 depending on the lead. Standard deviations range from 9.2 ms to 26.4 ms depending on the selected lead. In a few patients large inter-system differences were found, mainly due to different T wave morphologies. Using a multilead delineation, QT intervals were considerably more stable than single-lead measurements and resulted in a much better agreement between the two lead systems (CC: 0.98, QT difference: 1.1 ms ± 9.8 ms). Thus, EASI-derived 12- lead ECG may be used for reliable QT monitoring when the multilead delineation approach is adopted.
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| 9. |
- Martinez, Juan Pablo, et al.
(författare)
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Assessment of QT-measurement accuracy using the 12-lead electrocardiogram derived from EASI leads
- 2007
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Ingår i: Journal of Electrocardiology. - : Elsevier BV. - 1532-8430 .- 0022-0736. ; 40:2, s. 172-179
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Tidskriftsartikel (refereegranskat)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. (c) 2007 Elsevier Inc. All rights reserved.
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| 10. |
- Martínez, Juan Pablo, et al.
(författare)
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The STAFF III Database : ECGs recorded during acutely induced myocardial ischemia
- 2017
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Ingår i: Computing in Cardiology. - 2325-8861. ; 44
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Tidskriftsartikel (refereegranskat)abstract
- The STAFF III database was acquired with the aim of better understanding the ECG signatures observed during acute ischemia, with special focus on high-frequency QRS components. The database contains recordings from 104 patients undergoing elective balloon percutaneous coronary intervention. The database has not only been analyzed in numerous clinical studies, but also turned out to be an excellent tool for methodological development. Its use has, by far, exceeded the original aim. Inspired by this fact, the database has now been made publicly available at Physionet.
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