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当准妈妈开始孕育一个新生命后,自己的身体也会发生一系列变化,比如有时会感觉心慌气短。这种现象往往让准妈妈担心不已,怕宝宝在肚子里缺氧。为什么孕期会出现这种情况呢?孕期气短的原因心脏负担加大进入孕晚期后,准妈妈体内的血容量会比怀孕前增加40%~50%,每分钟的心跳频率增加了10~15次,心室每分钟射出的总血量也会增加25%~30%。因此,准妈妈的心脏运血负担有了明显的增加。
When expectant mothers begin to nurture a new life, their bodies also undergo a series of changes, such as feeling flustered sometimes. This phenomenon often mothers fear endless, afraid of baby in the stomach hypoxia. Why pregnancy occurs during pregnancy? Shortness of time because of increased heart burden into the third trimester of pregnancy, mothers blood volume in vivo than before pregnancy increased by 40% to 50%, heart rate per minute increased by 10 to 15 times , The total volume of ventricular injection per minute will increase by 25% to 30%. Therefore, mothers cardiac blood burden has increased significantly.