cardiograph

例句：

1. 1. The doctor used an electrocardiogram to diagnose the patient's heart condition.
   医生使用心电图来诊断病人的心脏状况。
2. 2. During the test, the patient had to lie on a table with electrodes attached to his chest and arms.
   在测试期间，患者必须躺在一张带有电极贴在他的胸部和手臂上的桌子上。
3. 3. The study found that regular exercise can improve heart health by reducing stress and improving blood circulation.
   研究发现，定期锻炼可以通过减少压力和改善血液循环来改善心脏健康。