Hemostatic abnormalities in patients with severe preeclampsia

Area of Science:

• Obstetrics and Gynecology
• Hematology
• Cardiovascular Medicine

Background:

• Preeclampsia is a leading medical complication during pregnancy.
• Early onset preeclampsia (before 34 weeks gestation) is characterized by hypertension and proteinuria.
• Pathological changes include endothelial dysfunction, microvasculature fibrin deposition, and coagulation cascade activation, leading to organ dysfunction.

Purpose of the Study:

• To investigate and compare the hematologic profiles of patients with early onset preeclampsia versus late preeclampsia.
• To identify specific coagulation and platelet abnormalities associated with severe early onset preeclampsia.

Main Methods:

• Plasma samples were collected from 50 patients with severe early onset preeclampsia (<34 weeks gestation) and 61 patients with late preeclampsia (≥34 weeks gestation).
• Levels of Factor VIIIR:Ag, fibrinogen, D-dimer, thrombomodulin, and platelet counts were analyzed.
• Correlations between hematologic parameters, including D-dimer and antithrombin, were examined.

Main Results:

• Factor VIIIR:Ag, fibrinogen, D-dimer, and thrombomodulin levels increased with advancing pregnancy in preeclamptic patients.
• Platelet count showed a strong correlation with D-dimer and antithrombin activation parameters.
• Severe early onset preeclampsia cases demonstrated activated coagulation and significantly lower platelet counts.
• Patients with early onset preeclampsia presented with more pronounced hematologic abnormalities compared to those with late preeclampsia.

Conclusions:

• Early onset preeclampsia represents a distinct subgroup of patients experiencing severe hematologic derangements.
• The findings highlight the critical role of coagulation activation and platelet reduction in the pathophysiology of early onset preeclampsia.
• These hematologic abnormalities are more severe in early onset preeclampsia than in late onset preeclampsia.