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Journal
2014 | 9 | 6 | 737-740
Article title

Agreement between manual and automated measurements of simple QRS/T angle

Content
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EN
Abstracts
EN
The spatial QRS/T angle (QRS/T) has been identified as a strong and independent predictor of adverse cardiac events. QRS/T can be determined from the electrocardiogram (ECG) by matrix transformation methods or formula which uses a combination of net QRS and T-wave amplitudes (QRS/Tsimple). Amplitudes can be measured automatically by using dedicated software (QRS/Tauto) or can be manually measured on a computer screen (QRS/Tmanual). This latter method allows analysis of QRS/T, when digital ECGs are not available. The aim of the study was to determine the agreement in the measurements between automatically derived QRS and T amplitudes and manually measured on the computer screen amplitudes. The relative error of the QRS/T between the two methods was estimated in 73 patients. In the case of QRS/Tmanual the inter-observer as well as intra-observer variability was estimated. The relative error between QRS/Tauto vs. QRS/Tmanual was 3.51%. Inter-observer and intra-observer variability of the QRS/Tmanual was 1.19% and 1.18% respectively. Manual measurement of the QRS/T is reliable, however, the predictive value of this parameter should be tested in clinical trials, before QRS/Tmanual can be considered a useful tool in clinical practice or retrospective studies.
Publisher

Journal
Year
Volume
9
Issue
6
Pages
737-740
Physical description
Dates
published
1 - 12 - 2014
online
16 - 8 - 2014
Contributors
  • Department of Cardiology, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Family Medicine, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Family Medicine, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Family Medicine, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Cardiology, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Cardiology, Medical University of Lublin, 20-090, Lublin, Poland
  • Department of Nephrology, Medical University of Lublin, 20-090, Lublin, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11536-013-0342-7
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