Arttu Holkeri1, Antti Eranti2, Tuomas V Kenttä3, Kai Noponen4, M Anette E Haukilahti3, Tapio Seppänen4, M Juhani Junttila3, Tuomas Kerola2, Harri Rissanen5, Markku Heliövaara5, Paul Knekt5, Aapo L Aro6, Heikki V Huikuri3. 1. Division of Cardiology, Heart and Lung Center, Helsinki University Central Hospital, Meilahti Tower Hospital, PL 340, Helsinki, HUS, Finland. Electronic address: arttu.holkeri@helsinki.fi. 2. Department of Internal Medicine, Päijät-Häme Central Hospital, Keskussairaalankatu 7, Lahti, Finland. 3. Research Unit of Internal Medicine, Medical Research Center, Faculty of Medicine, Oulu University Hospital and University of Oulu, P.O. Box 5000, Oulu, Finland. 4. Center for Machine Vision and Signal Analysis, University of Oulu, P.O. Box 4500, Oulu, Finland. 5. National Institute for Health and Welfare, P.O. Box 30, Helsinki, Finland. 6. Division of Cardiology, Heart and Lung Center, Helsinki University Central Hospital, Meilahti Tower Hospital, PL 340, Helsinki, HUS, Finland.
Abstract
BACKGROUND: No established method for digitizing and digital measuring of paper electrocardiograms (ECG) exists. We describe a paper ECG digitizing and digital measuring process, and report comparability to manual measurements. METHODS: A paper ECG was recorded from 7203 health survey participants in 1978-1980. With specific software, the ECGs were digitized (ECG Trace Tool), and measured digitally (EASE). A sub-sample of 100 ECGs was selected for manual measurements. RESULTS: The measurement methods showed good agreement. The mean global (EASE)-(manual) differences were 1.4ms (95% CI 0.5-2.2) for PR interval, -1.0ms (95% CI -1.5-[-0.5]) for QRS duration, and 11.6ms (95% CI 10.5-12.7) for QT interval. The mean inter-method amplitude differences of RampV5, RampV6, SampV1, TampII and TampV5 ranged from -0.03mV to 0.01mV. CONCLUSIONS: The presented paper-to-digital conversion and digital measurement process is an accurate and reliable method, enabling efficient storing and analysis of paper ECGs.
BACKGROUND: No established method for digitizing and digital measuring of paper electrocardiograms (ECG) exists. We describe a paper ECG digitizing and digital measuring process, and report comparability to manual measurements. METHODS: A paper ECG was recorded from 7203 health survey participants in 1978-1980. With specific software, the ECGs were digitized (ECG Trace Tool), and measured digitally (EASE). A sub-sample of 100 ECGs was selected for manual measurements. RESULTS: The measurement methods showed good agreement. The mean global (EASE)-(manual) differences were 1.4ms (95% CI 0.5-2.2) for PR interval, -1.0ms (95% CI -1.5-[-0.5]) for QRS duration, and 11.6ms (95% CI 10.5-12.7) for QT interval. The mean inter-method amplitude differences of RampV5, RampV6, SampV1, TampII and TampV5 ranged from -0.03mV to 0.01mV. CONCLUSIONS: The presented paper-to-digital conversion and digital measurement process is an accurate and reliable method, enabling efficient storing and analysis of paper ECGs.
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Authors: Tuomas Kerola; Antti Eranti; Aapo L Aro; M Anette Haukilahti; Arttu Holkeri; M Juhani Junttila; Tuomas V Kenttä; Harri Rissanen; Eric Vittinghoff; Paul Knekt; Markku Heliövaara; Heikki V Huikuri; Gregory M Marcus Journal: JAMA Netw Open Date: 2019-05-03
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