infarction
noun [ C or U ] medical specialized uk/ɪnˈfɑːk.ʃən/ us/ɪnˈfɑːrk.ʃən/
（组织）梗塞
the process in which tissue dies because something has blocked its blood supply, or an occasion on which this happens
A myocardial infarction happens when the blood flow to a part of the heart is blocked for a long enough time that part of the heart muscle is damaged. 当流往部分心肌的血液被阻时间过长，心肌因此受损时，就会发生心肌梗塞。