单选题
发布日期:2021-03-17
妊娠期血容量增加,但对心脏的影响不太大
分娩期是心脏负担最重的时期
妊娠晚期是以心排出量增加为主以适应血容量增多
产后3日内心脏负担已开始减轻
产后3日内孕妇发生心力衰竭的最危险期已过
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