Pregnancy after cerebral venous thrombosis

Area of Science:

• Obstetrics and Gynecology
• Hematology
• Thrombosis Research

Background:

• Pregnancy outcomes for women with prior cerebral vein thrombosis (CVT) on antithrombotic prophylaxis are not well-established.
• Low-molecular weight heparin (LMWH) is commonly used for prophylaxis, but its efficacy in this specific population requires further investigation.

Purpose of the Study:

• To assess the risk of recurrent venous thromboembolism (VTE) and bleeding in pregnant women with a history of CVT treated with LMWH.
• To evaluate pregnancy outcomes, including miscarriage and late obstetrical complications, in this cohort.
• To compare outcomes in pregnancies before and after CVT with LMWH prophylaxis.

Main Methods:

• A cohort study involving 63 pregnant women with a history of CVT receiving LMWH prophylaxis.
• Comparison of pregnancy outcomes between pregnancies before (without LMWH) and after (with LMWH) CVT in 25 women.
• Analysis of recurrent thrombosis, bleeding episodes, miscarriage rates, and late obstetrical complications.

Main Results:

• A low rate of recurrent thrombosis (3.2%) and no bleeding episodes were observed in women on LMWH.
• The risk of miscarriage was 13.5%, and late obstetrical complications occurred in 19.2% of pregnancies.
• Pregnancy outcomes were independent of prior obstetrical history and thrombophilia status, although thrombophilia was associated with more terminations.

Conclusions:

• Antithrombotic prophylaxis with LMWH in pregnant women with previous CVT is associated with a low risk of recurrent thrombosis and bleeding.
• These women face an elevated risk of obstetrical complications, necessitating careful monitoring and management.
• Further research is warranted to optimize management strategies for pregnant women with a history of CVT.