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充血性心力衰竭的影响

ID: ANH14129bchis
医学动画文字记录:如果你有心力衰竭,你的心脏已经失去了泵出足够血液来满足身体需要的能力。你可能有虚弱或损坏的心室壁,不能推动足够的血液流出你的心脏。你也可能有心室壁变硬变厚,不能让你的心脏充满足够的血液。如果你有左心衰竭,左心室不能向身体输送足够的富氧血液,使你感到疲劳和喘不过气来。左心室的衰竭也会增加肺部和左心室之间血管的血压。这种增加的压力迫使液体离开血液,进入肺组织,会导致呼吸困难。如果你有右心衰,右心室就不能以足够的力量将血液推到肺部。其结果是静脉中血液的积聚,导致身体组织中液体积聚,称为水肿。随着时间的推移,两侧的心力衰竭导致心室变弱、增大,向身体输送的血液变少。为了弥补减少的血量,神经系统会分泌压力激素,增加心跳的速度和力度。不幸的是,这些压力激素的持续分泌会导致心衰恶化,因为它们会破坏心室的肌细胞。

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