Observer variations in short period spectral analysis of heart rate variability.
25% of the corresponding mean LF/HF ratio. The smallest interobserver variations were found for the 'fixed frequency' method. The data showed that it is advantageous to select the 3-min ECG periods but not to select the frequency regions. Selection of the latter led to an increase in interobserver variation. The results of this study give a realistic impression of the intrasubject and interobserver variation to be expected when measuring the LF/HF ratio. This variation is considerable.
van Schelven
L J
LJ
Department of Biomedical Engineering, Utrecht, The Netherlands.
Oey
P L
PL
Klein
I H
IH
Barnas
M G
MG
Blankestijn
P J
PJ
Wieneke
G H
GH
D000704:Analysis of Variance; D002316:Cardiotonic Agents / Q000494:pharmacology; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000187:drug effects / Q000502:physiology*; D006706:Homeostasis; D006801:Humans; D006978:Hypertension, Renovascular / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009599:Nitroprusside / Q000494:pharmacology; D015588:Observer Variation; D010656:Phenylephrine / Q000494:pharmacology; D012016:Reference Values
D002316:Cardiotonic Agents; D009599:Nitroprusside; D010656:Phenylephrine