upset end joint

例句：

1. 1.The patient's heart rate was elevated at the upset end joint.
   患者的心率在心尖连接处升高。
2. 2.The fracture in the upper arm required surgical repair at the upset end joint.
   上臂的骨折需要手术修复在心尖连接处。
3. 3.During surgery, the surgeon carefully dissected the tissue to expose the upset end joint for repair.
   手术中，外科医生小心地分离组织以暴露心尖连接处进行修复。