reperfusion       
noun [ U ]  medical specialized uk/riː.pəˈfjuː.ʒən/ us/ˌriː.pɚˈfjuː.ʒən/
 (尤指在心脏病发作或中风之后使血液循环恢复正常的)再灌注
the action of making blood flow return to normal after the supply has been cut off, especially after a heart attack or stroke
  Reperfusion measures work best if they are started within 30 minutes after symptoms start. 在症状发生后30分钟内做再灌注效果最好。