为么左心衰时不是体循环淤血而是肺循环淤血?
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">回答这个问题之前,先做一个<span style="color: black;">基本</span>的科普。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">咱们</span>身体的血液是怎么流动的?</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">左心室射出的动脉血,<span style="color: black;">饱含</span>营养和氧气,<span style="color: black;">经过</span><span style="color: black;"><a style="color: black;">主动脉</a></span>,到达全身,为全身的器官<span style="color: black;"><a style="color: black;">供应活动</a></span>所要的养分。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">而后</span>,产生的废物会<span style="color: black;">经过</span>静脉,回到右心房,右心房的血<span style="color: black;">经过</span><span style="color: black;"><a style="color: black;">三尖瓣</a></span>,到达右心室,<span style="color: black;">而后</span>心脏收缩,射向<span style="color: black;"><a style="color: black;">肺动脉</a></span>,<span style="color: black;">此时</span>的血,都是废血,<span style="color: black;">亦</span>叫<span style="color: black;"><a style="color: black;">静脉血</a></span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">血到达肺部以后,<span style="color: black;">经过</span><span style="color: black;">呼气</span>与<span style="color: black;">外边</span>交换,废物排出,氧气和养分进入血液,<span style="color: black;">而后</span>血液聚集,<span style="color: black;">经过</span>肺静脉到达左心房,<span style="color: black;">此时</span>的血,<span style="color: black;">饱含</span>营养物质,<span style="color: black;">亦</span><span style="color: black;">便是</span>动脉血。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">此时血到达左心房,<span style="color: black;">经过</span><span style="color: black;"><a style="color: black;">二尖瓣</a></span>,到达左心室,<span style="color: black;">而后</span>心室收缩。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">于是就回到了<span style="color: black;">第1</span>步。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">如此循环,周而复始。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://picx.zhimg.com/80/v2-51c6883c918234fb41bb2000f490402d_720w.webp?source=1def8aca" style="width: 50%; margin-bottom: 20px;"></div><span style="color: black;">照片</span>来自网络<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">因此</span>,<span style="color: black;">咱们</span>身体血液流向的<span style="color: black;">过程</span>是:</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://picx.zhimg.com/80/v2-aca2edce3c6496b138015df0f157bd97_720w.webp?source=1def8aca" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">这般</span>来看,这个问题就简单了。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">所说</span>的<span style="color: black;"><a style="color: black;">心衰</a></span>,<span style="color: black;">便是</span>前向的动力<span style="color: black;">不足</span>,致使血液淤滞在后方……</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><a style="color: black;">左心衰</a></span>,<span style="color: black;">便是</span>左室功能<span style="color: black;">欠好</span>,血液淤滞在哪里呢?</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">沿着这个图往前找。很容易就<span style="color: black;">发掘</span>左心室的前面是左心房,<span style="color: black;">而后</span>是肺静脉,肺组织,<span style="color: black;">亦</span><span style="color: black;">便是</span>所说的</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><a style="color: black;">肺淤血</a></span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">咱们</span>延伸来看,右心衰会是什么结果呢?</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">同理,找到右室,<span style="color: black;">而后</span>往前看,右心房,腔静脉,身体,<span style="color: black;">亦</span><span style="color: black;">便是</span> <span style="color: black;"><a style="color: black;">体循环</a></span>淤血。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">有两点需要说明</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.在病变<span style="color: black;">初期</span>,<span style="color: black;">因为</span>心室的泵功能,它<span style="color: black;">能够</span>主动射血来代偿前向的阻力,<span style="color: black;">初期</span>两个系统是<span style="color: black;">能够</span>理解为<span style="color: black;"><a style="color: black;">互不干涉</a></span>,<span style="color: black;">亦</span><span style="color: black;">便是</span>说,肺淤血逆向寻找,到右心室就<span style="color: black;">能够</span>停止了。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.同理,到了病变晚期,心室失去了泵功能,<span style="color: black;">不可</span>代偿,到了<span style="color: black;">所说</span>的全心衰的<span style="color: black;">状况</span>,<span style="color: black;">便是</span><span style="color: black;">全部</span>循环链都在低质量的状态,<span style="color: black;">此时</span>候,左心衰<span style="color: black;">一样</span><span style="color: black;">亦</span><span style="color: black;">能够</span><span style="color: black;">导致</span>右心衰,致使体循环,肺循环都<span style="color: black;">显现</span>淤血的<span style="color: black;">状况</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以上。</p>
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外链发布论坛学习网络优化SEO。 你的话深深触动了我,仿佛说出了我心里的声音。 我完全同意你的看法,期待我们能深入探讨这个问题。 “沙发”(SF,第一个回帖的人) 感谢你的精彩评论,为我的思绪打开了新的窗口。
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