其结果，抽液前后平均心率有显著性差异（P＜0．05），而单纯左侧胸腔积液平均心率变化无显著性差异（P＞0．05）；
The average rhythm of heart beats showed obvious difference(P<0.05), but there was no difference in the cases with pleural fluid on the left side only (P>0.05).
左侧心室的抽吸是最有力的(最激烈的)，这就是为什么人的心跳大多感觉在胸腔的左侧的原因。
The left ventricle pumps most forcefully, which is why a person's heartbeat is felt more on the left side of the chest.
它略微倾斜，一部分突出在外并与左胸腔相连，这就是为什么它看起来好像位于左侧。
It's tipped slightly so that a part of it sticks out and taps against the left side of the chest, which is what makes it seem as though it's located there.
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