di·as·to·le
noun/daɪˈæstəli/
/daɪˈæstəli/
[uncountable, countable] (medical)- the stage of the heart’s rhythm when its muscles relax and the heart fills with blood
心舒期 Word Originlate 16th cent.: via late Latin from Greek, ‘separation, expansion’, from diastellein, from dia ‘apart’ + stellein ‘to place’.