Power spectrum analysis of the fetal heart rate during noradrenaline infusion and acute hypoxemia in the chronic fetal lamb preparation.
In a chronically instrumented fetal lamb the effect on heart rate variability of noradrenaline as well as hypoxemia is studied by the use of power spectral analysis. Subsequent to both noradrenaline infusion and hypoxemia the very low frequency components of the variability are markedly decreased as compared with control conditions. After hypoxemia also a high frequency peak appears in the spectrum.
Lindecrantz
K
K
Department of Applied Electronics, Chalmers University of Technology, Göteborg, Sweden.
Cerutti
S
S
Civardi
S
S
Hökegård
K H
KH
Lilja
H
H
Rosèn
K G
KG
Signorini
M G
MG
Widmark
C
C
D000208:Acute Disease; D000465:Algorithms; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects / Q000502:physiology; D001919:Bradycardia / Q000503:physiopathology; D003627:Data Interpretation, Statistical; D004562:Electrocardiography / Q000187:drug effects; D005260:Female; D005333:Fetus; D006339:Heart Rate / Q000502:physiology; D006340:Heart Rate, Fetal / Q000187:drug effects* / Q000502:physiology*; D000860:Hypoxia / Q000503:physiopathology*; D007262:Infusions, Intravenous; D009638:Norepinephrine / Q000008:administration & dosage / Q000494:pharmacology*; D011247:Pregnancy; D012756:Sheep; D012815:Signal Processing, Computer-Assisted
D009638:Norepinephrine