DocumentCode :
473682
Title :
Non-invasive assessment of atrioventricular conduction properties and their effects on ventricular response in atrial fibrillation
Author :
Climent, A.M. ; Husser, D. ; Millet, J. ; Corino, V.D.A. ; Mainardi, L. ; Klein, H.U. ; Bollmann, A.
Author_Institution :
Otto-von-Guericke Univ. Magdeburg, Magdeburg
fYear :
2006
fDate :
17-20 Sept. 2006
Firstpage :
105
Lastpage :
108
Abstract :
This study sought to determine the relation between mean RR intervals as well as its circadian rhythm and non-invasive markers of atrioventricular (AV) node refractoriness and concealed AV conduction obtained from Lorenz-plot (LP) analysis of 10-min and 24-h ECGs. In 29 patients with persistent atrial fibrillation (AF) the 1.0-s intercept of the lower envelope (LE1.0) of the plot and the degree of scatter (S) above the envelope were measured as markers for refractoriness and concealed conduction. Mean 24-h RR was independently associated with LE1.0 and S calculated from 10-min ECGs. In 48% patients, a significant circadian RR rhythm was present, which was independently associated with both S and LE1.0 amplitudes. AV conduction properties obtained from LP analysis of 10-min ECGs are useful for predicting mean 24-h heart rate in AF. The degree of variation in refractoriness and concealed conduction are determinants of significant circadian heart rate variation in AF.
Keywords :
bioelectric phenomena; cardiology; circadian rhythms; patient diagnosis; Lorenz-plot analysis; atrial fibrillation; atrioventricular conduction properties; circadian rhythm; noninvasive assessment; time 10 min; time 24 h; ventricular response; Atrial fibrillation; Cardiology; Circadian rhythm; Electrocardiography; Heart rate; Optimal control; Performance analysis; Performance evaluation; Sampling methods; Scattering;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computers in Cardiology, 2006
Conference_Location :
Valencia
Print_ISBN :
978-1-4244-2532-7
Type :
conf
Filename :
4511799
Link To Document :
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