[Heart rate and blood pressure interaction in normotensive and chronic hypertensive pregnancy].
Pregnancy has impact on autonomic control. Since hypertensive pregnancy disorders are a major cause of maternal mortality we investigated the baroreflex sensitivity (BRS) in chronic hypertensive pregnant women (CH), normotensive pregnant (PRE) and non-pregnant (NPRE) women. In addition to the traditional 'sequence method' we used joint symbolic dynamics (JSD). BRS was significantly reduced in all pregnancies compared with NPRE (p < 0.00001) but there was no significant difference between CH and PRE. Contrary, the JSD measures revealed significant differences (p < 0.00001) in the heart rate and blood pressure interactions between PRE and CH. In conclusion, JSD measures uncovered a different gestation related adaptation of autonomic regulation in women with chronic.
Baumert
M
M
Faculty of Medical Engineering, University of Applied Sciences, Jena, Germany.
Walther
T
T
Baier
V
V
Stepan
H
H
Faber
R
R
Voss
A
A
D000328:Adult; D001341:Autonomic Nervous System / Q000503:physiopathology; D017704:Baroreflex / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology*; D015924:Blood Pressure Monitors; D002908:Chronic Disease; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D008432:Mathematical Computing; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000503:physiopathology*; D011263:Pregnancy Trimester, Third; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted