Nervus cardiacus cervicalis medius

例句：

1. 1. The patient's condition was stable, with a normal blood pressure and heart rate.
   病人的状况稳定，血压和心率正常。
2. 2. The doctor performed an arteriogram to diagnose the patient's condition.
   医生进行了血管造影以诊断病人的状况。
3. 3. The study found that exercise can improve blood circulation and reduce the risk of heart disease.
   研究发现，运动可以改善血液循环，降低心脏病风险。