stenosis of renal artery

例句：

1. 1.The patient had a narrowing of the arteries due to a heart attack.
   由于心脏病发作，病人的动脉变窄了。
2. 2.The stenosis is causing significant blood flow problems in the affected area.
   这种狭窄造成了受影响区域的显著血流问题。
3. 3. Surgery is often necessary to relieve the stenosis and improve blood flow.
   通常需要手术来缓解狭窄并改善血流。