yī shēng / jiàn yì / tā / zuò / yì zhāng / xīn diàn tú / yǐ / pái chá / xiōng mèn / de / yuán yīn医生建议他做一张心电图,以排查胸闷的原因。The doctor recommended that he get an ECG to investigate the cause of his chest tightness.