“premature systole/extrasystole”的概念、定义、翻译、参考文献-科学参考

单词	premature systole/extrasystole
释义	premature systole/extrasystole Encyclopedia 医学期前收缩释 premature systole/extrasystole期前收缩提前出现的、非窦房结起源的心搏。又称过早搏动（早搏）、期外收缩。
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