TY - JOUR
T1 - Circadian rhythm in the cardiovascular system
T2 - Considerations in non-invasive electrophysiology
AU - Guo, Yi Fang
AU - Stein, Phyllis K.
PY - 2002/9
Y1 - 2002/9
N2 - Most cardiovascular activities show a circadian rhythm, as do electrophysiological phenomenon. Under the influence of both external stimuli and endogenous homoeostatic mechanisms, cardiac electrophysiological properties change diurnally and enable the cardiovascular system adapt to rest-exercise cycles. According to recent reports, almost all non-invasive electrophysiological phenomena, such as electrocardiographic indices, cardiac refractoriness and conduction, pacing and defibrillation threshold, heart rate variability indices, and even Q-T dispersion and T-wave alternans, show diurnal variability. Furthermore, many of these changes are clinically significant and may affect results of some diagnostic studies. These characteristics of the cardiovascular system require us keep in mind the "time" factor any time we analyze electrophysiological results and make clinical decisions.
AB - Most cardiovascular activities show a circadian rhythm, as do electrophysiological phenomenon. Under the influence of both external stimuli and endogenous homoeostatic mechanisms, cardiac electrophysiological properties change diurnally and enable the cardiovascular system adapt to rest-exercise cycles. According to recent reports, almost all non-invasive electrophysiological phenomena, such as electrocardiographic indices, cardiac refractoriness and conduction, pacing and defibrillation threshold, heart rate variability indices, and even Q-T dispersion and T-wave alternans, show diurnal variability. Furthermore, many of these changes are clinically significant and may affect results of some diagnostic studies. These characteristics of the cardiovascular system require us keep in mind the "time" factor any time we analyze electrophysiological results and make clinical decisions.
KW - Cardiovascular system
KW - Chronobiology
KW - Circadian rhythm
KW - Electrophysiology
UR - http://www.scopus.com/inward/record.url?scp=0036753591&partnerID=8YFLogxK
U2 - 10.1023/A:1016337210738
DO - 10.1023/A:1016337210738
M3 - Article
C2 - 12114850
AN - SCOPUS:0036753591
VL - 6
SP - 267
EP - 272
JO - Cardiac Electrophysiology Review
JF - Cardiac Electrophysiology Review
SN - 1385-2264
IS - 3
ER -