NDLI: Influence of T wave amplitude on automatic QT measurement

Content Provider	IEEE Xplore Digital Library
Author	McLaughlin, N.B. Campbell, R.W.F. Murray, A.
Copyright Year	1995
Description	Author affiliation: Dept. of Regional Med. Phys., Freeman Hospital, Newcastle upon Tyne, UK (McLaughlin, N.B.)
Abstract	The aim was to investigate the influence of the T wave amplitude on 3 automatic QT measurement techniques. The subjects were 20 normals and 20 cardiac patients with arrhythmias and/or post myocardial infarction. 1 manual and 3 automatic algorithms were used to measure the QT interval from each of the 12 standard leads of each subject. The difference (denoted AQD) between the manual reference and automatic QT measurements was calculated. The amplitude of each T wave was also measured. The variability of AQD was found to fall for most techniques with greater T wave amplitude for both subject groups. The mean AQD is lower in the clinical vs normal subject groups for small T waves. It was concluded that T wave amplitude influences automatic QT measurement. However, since performance is different even when T amplitude is matched for normal and clinical ECGs this suggests additional morphological influences.
Starting Page	777
Ending Page	780
File Size	294873
Page Count	4
File Format	PDF
ISBN	0780330536
DOI	10.1109/CIC.1995.482780
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-09-10
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrocardiography Measurement techniques Heart rate interval Signal processing algorithms Cardiology Myocardium Bandwidth Manuals Niobium Physics
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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