PMID: 9426035Jan 13, 1998Paper

Circadian rhythms of atrioventricular conduction properties in chronic atrial fibrillation with and without heart failure

Journal of the American College of Cardiology
J HayanoT Fujinami

Abstract

We examined the circadian variations in atrioventricular (AV) conduction properties during atrial fibrillation (AF) by a technique based on the Lorenz plot of successive ventricular response (VR) intervals and analyzed their relations with clinical features. The VR interval in chronic AF shows circadian variation, which is attenuated in patients with an increased risk of death. Although the VR interval is determined by the dynamic processes in the AV node randomly stimulated by rapid atrial activity, the circadian variations of the AV conduction properties related to this mechanism are unknown. In 48 patients with chronic AF, Lorenz plots were generated on overlapping sequential segments of 512 VR intervals in 24-h ambulatory electrocardiograms. For each scatter plot, the 1.0-s intercept of the lower envelope (LE1.0) of the plot and the degree of scatter above the envelope (root mean square difference from the envelope [scattering index]) were measured for estimating AV node refractoriness and concealed AV conduction, respectively. In all patients, a significant circadian rhythm was observed for the average VR interval, LE1.0 and scattering index, with an acrophase occurring at night. The mesor, amplitude and acrophase of LE1.0...Continue Reading

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Citations

Jul 29, 2009·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·John SilberbauerNeil Sulke
Feb 23, 2012·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Akinori SairakuYasuki Kihara
May 27, 2003·American Heart Journal·Yi-Fang Guo, Phyllis K Stein
Jul 19, 2006·Canadian Journal of Physiology and Pharmacology·Richard S T LeungT Douglas Bradley
Jun 7, 2011·Sleep Medicine Reviews·Francesco PortaluppiFabio Fabbian
Jul 31, 2007·Advanced Drug Delivery Reviews·Francesco Portaluppi, Ramón C Hermida
Dec 2, 2015·IEEE Transactions on Bio-medical Engineering·Mikael HenrikssonFrida Sandberg
Sep 1, 2011·IEEE Transactions on Bio-medical Engineering·Valentina D A CorinoLeif Sornmo
Dec 30, 2014·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Valentina D A CorinoLeif Sörnmo
Oct 17, 2017·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Hitesh C PatelStuart D Rosen
Oct 18, 2006·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Andreas BollmannLeif Sörnmo
Jun 1, 2019·Cardiovascular Research·Oliver Monfredi, Edward G Lakatta
Oct 18, 2006·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Aleem U KhandPeter W Macfarlane
Oct 22, 2002·American Journal of Physiology. Heart and Circulatory Physiology·Zoran B PopovićTodor N Mazgalev
Aug 17, 2002·Chronobiology International·Roberto ManfrediniFrancesco Portaluppi
Jul 5, 2005·Journal of Applied Physiology·Richard S T LeungT Douglas Bradley
Oct 27, 2015·American Journal of Physiology. Heart and Circulatory Physiology·Valentina D A CorinoSara R Ulimoen

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