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Type: Artigo de periódico
Title: Pregnancy-associated venous thromboembolism in combined heterozygous factor V Leiden and prothrombin G20210A mutations
Title Alternative: Tromboembolismo venoso na gravidez associado a combinação de mutações do fator V de Leiden e G20210A do gene da protrombina
Author: Couto, Egle
Nomura, Marcelo Luís
Barini, Ricardo
Silva, João Luiz Pinto e
Abstract: CONTEXT: Pregnancy and puerperium raise the risk of thromboembolic events, and these risks are increased in women who are carriers of thrombophilia factors. Prothrombin (FII) G20210A and factor V Leiden heterozygous mutations are associated with moderate risk of thrombosis. The association of these thrombophilic conditions is very rare in pregnancy, and the real risk of thrombosis is unknown. CASE REPORT: We describe a case of a pregnant woman who was found to be carrier of heterozygous factor V Leiden and prothrombin (FII) G20210A mutations. Five years before pregnancy she had had an episode of extensive deep venous thrombosis in the ileofemoral region, while using hormonal contraceptives. Anticardiolipin antibody (ACA), lupus anticoagulant and deficiencies of protein C, protein S and antithrombin III were evaluated by means of enzyme-linked immunosorbent assay (ELISA), dilute Russell Viper Venom time (dRVVT), coagulometric and chromogenic methods. Deoxyribonucleic acid (DNA) was amplified using the polymerase chain reaction (PCR) to study the factor V Leiden and G20210A mutations in the prothrombin gene and C677T mutation in the methylene tetrahydrofolate reductase (MTHFR) gene. In the sixth week of her first pregnancy, she developed another episode of deep venous thrombosis in the femoropopliteal veins of the right leg. She was treated with low-molecular weight heparin (nadroparin) until parturition (0.3 ml or 2,850 UI/day). The pregnancy evolved without any significant obstetric morbidity. The patient delivered a healthy baby by cesarean section. During the puerperium, she used prophylactic doses of nadroparin for (0.3 ml or 2,850 UI/day) six weeks and had no complications. We suggest that women who have an association of thrombophilia factors and a prior episode of venous thromboembolism must have antepartum anticoagulation management using unfractioned or low-molecular weight heparin and postpartum management using low-molecular weight heparin or oral anticoagulants. Anticoagulation is recommended during pregnancy because the real magnitude of the risk of major and life-threatening thromboembolic events in these women is unknown.
CONTEXTO: A gravidez e o puerpério aumentam os risco de eventos tromboembólicos, e estes riscos são maiores em mulheres portadoras de trombofilias. As mutações (FII) G20210A do gene da protrombina e a heterozigose da mutação do fator V de Leiden conferem risco moderado de trombose. A associação desses dois fatores é muito rara e o real risco de trombose é desconhecido. RELATO DE CASO: Descrevemos o caso de uma gestante portadora de ambos os fatores. Cinco anos antes da gestação, apresentou um episódio de trombose venosa associada ao uso de contraceptivos orais, e na sexta semana de gestação apresentou novo episódio. Foi tratada desde então com heparina de baixo peso molecular (nadroparina) até o parto. A gestação evoluiu sem nenhuma morbidade obstétrica significativa, e a paciente deu à luz um recém-nascido no termo, de parto cesariana. No puerpério, foi mantida nadroparina por seis semanas, e não ocorreram complicações. Mulheres portadoras de trombofilias e com antecedente de trombose devem ser mantidas em anticoagulação por toda a gestação e puerpério com heparina não-fracionada ou de baixo peso molecular. Recomenda-se a anticoagulação durante a gravidez pois não se conhece a magnitude real do risco de eventos tromboembólicos potencialmente fatais.
Subject: Gravidez
Fator V de coagulação
Factor V
Editor: Associação Paulista de Medicina - APM
Rights: aberto
Identifier DOI: 10.1590/S1516-31802005000600007
Date Issue: 1-Dec-2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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