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心脏收缩又称收缩期（英语：Systole，/ˈsɪstəli/，SIST-ə-lee）是心动周期中的一个环节，当心室内血液充满后，心室内的血液会射入动脉，这一过程就叫心脏收缩 [1][2]。心脏收缩的基础是心肌的收缩性完好。[3]
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