circulatory system diseases

例句：

1. 1. The patient had a heart attack and was admitted to the hospital.
   病人心脏病发作并被送往医院。
2. 2. He has been suffering from circulatory system diseases for many years.
   他多年来一直患有循环系统疾病。
3. 3. Cirrhosis is a common cause of circulatory system diseases.
   肝硬化是循环系统疾病的常见原因。