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[Heart rate and blood pressure interaction in normotensive and chronic hypertensive pregnancy]

M Baumert1, T Walther, V Baier

  • 1Faculty of Medical Engineering, University of Applied Sciences, Jena, Germany.

Biomedizinische Technik. Biomedical Engineering
|December 6, 2002
PubMed

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.

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