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Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve

BACKGROUND: Pregnancy is associated with several cardiocirculatory changes that can significantly impact underlying cardiac disease. These changes include an increase in cardiac output, sodium, and water retention leading to blood volume expansion, and reductions in systemic vascular resistance and...

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Autores principales: Ayad, Sherif W., Hassanein, Mahmoud M., Mohamed, Elsayed A., Gohar, Ahmed M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Libertas Academica 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4750893/
https://www.ncbi.nlm.nih.gov/pubmed/26884686
http://dx.doi.org/10.4137/CMC.S36740
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author Ayad, Sherif W.
Hassanein, Mahmoud M.
Mohamed, Elsayed A.
Gohar, Ahmed M.
author_facet Ayad, Sherif W.
Hassanein, Mahmoud M.
Mohamed, Elsayed A.
Gohar, Ahmed M.
author_sort Ayad, Sherif W.
collection PubMed
description BACKGROUND: Pregnancy is associated with several cardiocirculatory changes that can significantly impact underlying cardiac disease. These changes include an increase in cardiac output, sodium, and water retention leading to blood volume expansion, and reductions in systemic vascular resistance and systemic blood pressure. In addition, pregnancy results in a hypercoagulable state that increases the risk of thromboembolic complications. OBJECTIVES: The aim of this study is to assess the maternal and fetal outcomes of pregnant women with mechanical prosthetic heart valves (PHVs). METHODS: – Maternal and fetal complications and the site of the replaced valve (mitral, aortic, or double); – Maternal and fetal complications and warfarin dosage (≤5 mg, >5 mg); – Maternal and fetal complications and the type of anticoagulation administered during the first trimester. RESULTS: This study included 60 patients (60%) with mitral valve replacement (MVR), 22 patients (22%) with aortic valve replacement (AVR), and 18 patients (18%) with double valve replacement (DVR). A total of 65 patients (65%) received >5 mg of oral anticoagulant (warfarin), 33 patients (33%) received ≤5 mg of warfarin, and 2 patients (2%) received low-molecular-weight heparin (LMWH; enoxaparin sodium) throughout the pregnancy. A total of 17 patients (17%) received oral anticoagulant (warfarin) during the first trimester: 9 patients received a daily warfarin dose of >5 mg while the remaining 8 patients received a daily dose of ≤5 mg. Twenty-eight patients (28%) received subcutaneous (SC) heparin calcium and 53 patients (53%) received SC LMWH (enoxaparin sodium). Prosthetic valve thrombosis occurred more frequently in patients with MVR (P = 0.008). Postpartum hemorrhage was more common in patients with aortic valve prostheses than in patients with mitral valve prostheses (P = 0.005). The incidence of perinatal death was higher in patients with AVR (P = 0.014). The incidence of live birth was higher in patients with DVR (P = 0.012). The incidence of postpartum hemorrhage was higher in patients who received a daily dose of >5 mg of warfarin than in patients who received ≤5 mg of warfarin (P = 0.05). The incidence of spontaneous abortion was also higher in patients receiving >5 mg of warfarin (P ≤ 0.001), while the incidence of live births was higher in patients receiving ≤5 mg of warfarin (P = 0.008). There was a statistically significant difference between the anticoagulant received during the first trimester and cardiac outcomes. Specifically, patients on heparin developed more heart failure (P = 0.008), arrhythmias (P = 0.008), and endocarditis (P = 0.016). There was a statistically significant relationship between heparin shifts during the first trimester and spontaneous abortion (P = 0.003). CONCLUSION: Warfarin use during the first trimester is safer for the mother but is associated with more fetal loss, especially in doses that exceed 5 mg. The incidence of maternal complications is greater in women who receive LMWH or unfractionated heparin during the first trimester, especially prosthetic valve thrombosis, although the fetal outcome is better because heparin does not cross the placenta.
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spelling pubmed-47508932016-02-16 Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve Ayad, Sherif W. Hassanein, Mahmoud M. Mohamed, Elsayed A. Gohar, Ahmed M. Clin Med Insights Cardiol Original Research BACKGROUND: Pregnancy is associated with several cardiocirculatory changes that can significantly impact underlying cardiac disease. These changes include an increase in cardiac output, sodium, and water retention leading to blood volume expansion, and reductions in systemic vascular resistance and systemic blood pressure. In addition, pregnancy results in a hypercoagulable state that increases the risk of thromboembolic complications. OBJECTIVES: The aim of this study is to assess the maternal and fetal outcomes of pregnant women with mechanical prosthetic heart valves (PHVs). METHODS: – Maternal and fetal complications and the site of the replaced valve (mitral, aortic, or double); – Maternal and fetal complications and warfarin dosage (≤5 mg, >5 mg); – Maternal and fetal complications and the type of anticoagulation administered during the first trimester. RESULTS: This study included 60 patients (60%) with mitral valve replacement (MVR), 22 patients (22%) with aortic valve replacement (AVR), and 18 patients (18%) with double valve replacement (DVR). A total of 65 patients (65%) received >5 mg of oral anticoagulant (warfarin), 33 patients (33%) received ≤5 mg of warfarin, and 2 patients (2%) received low-molecular-weight heparin (LMWH; enoxaparin sodium) throughout the pregnancy. A total of 17 patients (17%) received oral anticoagulant (warfarin) during the first trimester: 9 patients received a daily warfarin dose of >5 mg while the remaining 8 patients received a daily dose of ≤5 mg. Twenty-eight patients (28%) received subcutaneous (SC) heparin calcium and 53 patients (53%) received SC LMWH (enoxaparin sodium). Prosthetic valve thrombosis occurred more frequently in patients with MVR (P = 0.008). Postpartum hemorrhage was more common in patients with aortic valve prostheses than in patients with mitral valve prostheses (P = 0.005). The incidence of perinatal death was higher in patients with AVR (P = 0.014). The incidence of live birth was higher in patients with DVR (P = 0.012). The incidence of postpartum hemorrhage was higher in patients who received a daily dose of >5 mg of warfarin than in patients who received ≤5 mg of warfarin (P = 0.05). The incidence of spontaneous abortion was also higher in patients receiving >5 mg of warfarin (P ≤ 0.001), while the incidence of live births was higher in patients receiving ≤5 mg of warfarin (P = 0.008). There was a statistically significant difference between the anticoagulant received during the first trimester and cardiac outcomes. Specifically, patients on heparin developed more heart failure (P = 0.008), arrhythmias (P = 0.008), and endocarditis (P = 0.016). There was a statistically significant relationship between heparin shifts during the first trimester and spontaneous abortion (P = 0.003). CONCLUSION: Warfarin use during the first trimester is safer for the mother but is associated with more fetal loss, especially in doses that exceed 5 mg. The incidence of maternal complications is greater in women who receive LMWH or unfractionated heparin during the first trimester, especially prosthetic valve thrombosis, although the fetal outcome is better because heparin does not cross the placenta. Libertas Academica 2016-02-10 /pmc/articles/PMC4750893/ /pubmed/26884686 http://dx.doi.org/10.4137/CMC.S36740 Text en © 2016 the author(s), publisher and licensee Libertas Academica Ltd. This is an open-access article distributed under the terms of the Creative Commons CC-BY-NC 3.0 license.
spellingShingle Original Research
Ayad, Sherif W.
Hassanein, Mahmoud M.
Mohamed, Elsayed A.
Gohar, Ahmed M.
Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title_full Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title_fullStr Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title_full_unstemmed Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title_short Maternal and Fetal Outcomes in Pregnant Women with a Prosthetic Mechanical Heart Valve
title_sort maternal and fetal outcomes in pregnant women with a prosthetic mechanical heart valve
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4750893/
https://www.ncbi.nlm.nih.gov/pubmed/26884686
http://dx.doi.org/10.4137/CMC.S36740
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