NDLI: Effect of heart rate and body position on the complexity of the QRS and T wave in healthy subjects

Content Provider	IEEE Xplore Digital Library
Author	Batchvarov, V.N. Bortolan, G. Christov, I.I.
Copyright Year	2008
Description	Author affiliation: Centre of Biomed. Eng., Bulgarian Acad. of Sci., Sofia (Christov, I.I.) \|\| CNR, Inst. of Biomed. Eng., Padova (Bortolan, G.) \|\| St George's Univ. of London, London (Batchvarov, V.N.)
Abstract	We analysed the effect of heart rate and body position on the complexity of the QRS and T wave quantified by the ratio of $2^{nd}/1^{st}$ eigenvalue from principal component analysis (PCA) (QRS-PCA, T-PCA) using continuous 25 min 12-lead digital ECGs (500 Hz, 4.88 muV resolution) acquired on 2 occasions in supine and standing position in 15 healthy subjects (8 men, age 28.6plusmn7.5 years). In the group as a whole, QRS-PCA and T-PCA did not differ significantly between the two positions. However, the linear correlation coefficient between the PCA parameters and the RR interval varied widely between different subjects in the supine position (QRS-PCA: from 0.002 to 0.61; T-PCA: from 0.01 to 0.65) and even more in standing position (QRS-PCA: from -0.55 to 0.48; T-PCA: from -0.63 to 0.51). In both positions, the intra-subject variability of QRS-PCA and T-PCA was significantly smaller than the inter-subject variability.
Starting Page	225
Ending Page	228
File Size	372123
Page Count	4
File Format	PDF
ISBN	9781424437061
ISSN	02766547
DOI	10.1109/CIC.2008.4749018
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-14
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Computers in Cardiology(CinC)
Subject Keyword	Heart rate Electrocardiography Principal component analysis Medical diagnostic imaging Cardiology Biomedical engineering Eigenvalues and eigenfunctions Databases Shape Protocols
Content Type	Text
Resource Type	Article

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