心脏机械瓣膜置换术后妊娠妇女低强度华法林抗凝治疗56例

目的 探讨心脏机械瓣膜置换术后妊娠妇女低强度抗凝治疗的方法,以及抗凝药物对孕妇和胎儿的影响.方法 随访56例心脏机械瓣膜置换术后妇女妊娠、分娩期抗凝治疗情况.结果 56例(61例次)妊娠全程均口服华法林行抗凝治疗,42例用国产华法林(3.02±0.85)mg/日,14例用进口华法林(2.84±0.57)mg/日,国际标准比值(INR)均值为1. 67±0.58.所有孕妇均无严重出血及栓塞等并发症发生,仅11例次有一般性出血现象.本组足月妊娠47例,早产7例,自然流产6例,死产(畸胎)1例;低体重儿6例.新生儿均无畸形发生.结论 心脏机械瓣膜置换术后妇女妊娠全程服用较小剂量华法林(＜5 mg/日)行低强度抗凝治疗(INR=1.5～2.0)对孕妇安全、方便,且胎儿并发症发生率较低.

Abstract：

Objective To evaluate the method of low-intensity anticoagulation therapy in the pregnant women who had received mechanical heart valve replacemant, and the effects of warfarin on the pregnant women and their fetus. Methods This retrospective study involved 56 pregnant women( 61 pregnancies)who had received mechanical heart valve replacement.Their pregnant status, delivery, and anticoagulation therapy were observed and followed-up between May 1986 and November 2009 at West China Hospital of Sichuan University. Results All patients took oral anticoagulant (warfarin) throughout pregnancy. The dose of domestic warfarin was ( 3.02 ± 0.85 ) mg/d ( in 42 cases), and the dose of imported warfarin was (2.84 ± 0.57 )mg/d (in 14 cases). The mean INR value of 401 samples from patients was 1.67 ±0.58. No thromboembolism or major hemorrhagic complications occurred. Minor bleeding occurred in 11 pregnancies. Forty-seven patients had term delivery, 7 had premature birth, 6 had spontaneous abortion, and 1 had intrauterine fetal death. Six newborns were born with low birth weight (2.3 ± 0. 5 ) kg, and no abnormal fetus was observed. Conclusion The low-intensity anticoagulation therapy with warfarin (at a dose of less than 5 mg/d) and a INR target of 1.5 to 2.0 was safe and convenient for the pregnant women,who had received mechanical heart valve replacement. The abnormalities rate of fetus was low.

Low-intensity anticoagulation therapy in the pregnant women with mechanical heart valves:a report with 56 cases

Objective To evaluate the method of low-intensity anticoagulation therapy in the pregnant women who had received mechanical heart valve replacemant, and the effects of warfarin on the pregnant women and their fetus. Methods This retrospective study involved 56 pregnant women( 61 pregnancies)who had received mechanical heart valve replacement.Their pregnant status, delivery, and anticoagulation therapy were observed and followed-up between May 1986 and November 2009 at West China Hospital of Sichuan University. Results All patients took oral anticoagulant (warfarin) throughout pregnancy. The dose of domestic warfarin was ( 3.02 ± 0.85 ) mg/d ( in 42 cases), and the dose of imported warfarin was (2.84 ± 0.57 )mg/d (in 14 cases). The mean INR value of 401 samples from patients was 1.67 ±0.58. No thromboembolism or major hemorrhagic complications occurred. Minor bleeding occurred in 11 pregnancies. Forty-seven patients had term delivery, 7 had premature birth, 6 had spontaneous abortion, and 1 had intrauterine fetal death. Six newborns were born with low birth weight (2.3 ± 0. 5 ) kg, and no abnormal fetus was observed. Conclusion The low-intensity anticoagulation therapy with warfarin (at a dose of less than 5 mg/d) and a INR target of 1.5 to 2.0 was safe and convenient for the pregnant women,who had received mechanical heart valve replacement. The abnormalities rate of fetus was low.