yī shēng / gěi / tā / dǎ le / yì zhēn / qiáng xīn zhēn / tā / de / xīn tiào / cái / wěn dìng / xià lái

医生给他打了一针强心针，他的心跳才稳定下来。

The doctor gave him a heart-strengthening shot, and his heartbeat finally stabilized.