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Related Experiment Videos

Skin capillary density changes in normal pregnancy and pre-eclampsia.

Khaled M Hasan1, Isaac T Manyonda, Fu Siong Ng

  • 1Clinical Pharmacology Unit, St George's Hospital Medical School, London, UK.

Journal of Hypertension
|December 11, 2002
PubMed
Summary

Pre-eclampsia is linked to reduced capillary density, unlike normal pregnancies where it increases. This capillary rarefaction may explain high blood pressure in pre-eclampsia.

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Area of Science:

  • Cardiovascular Physiology
  • Reproductive Medicine
  • Microcirculation Research

Background:

  • Essential hypertension is associated with microcirculatory abnormalities, including reduced capillary density (rarefaction).
  • Peripheral vasodilation and angiogenesis are crucial for normal pregnancy adaptations.

Purpose of the Study:

  • To investigate if impaired angiogenesis, indicated by capillary rarefaction, contributes to pre-eclampsia.
  • To explore the role of microcirculation in pre-eclampsia pathogenesis.

Main Methods:

  • Intravital capillary video-microscopy was used to assess skin capillary density.
  • Functional and structural capillary density were measured in healthy pregnant women, non-pregnant controls, and women with pre-eclampsia.

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Main Results:

  • Capillary density significantly increased in normal pregnancy.
  • Pre-eclamptic women exhibited significantly lower functional and structural capillary density.
  • Skin capillary density showed an inverse correlation with blood pressure in pregnancy and pre-eclampsia.

Conclusions:

  • Low capillary density may contribute to the failure of blood pressure to decrease in pre-eclampsia.
  • Reduced capillary density might reflect a maladaptive cardiovascular response in pre-eclampsia.