```json
{
    "no": ["no"],
    "yes": ["yes"]
}
```
Based on the given feature, "LID_S_n" with categories ['yes', 'no'], if the value of "LID_S_n" is "no" (no lidocaine use in the ICU), it suggests that the patient does not have chronic heart failure. Similarly, if the value of "LID_S_n" is "yes" (lidocaine use in the ICU), it suggests that the patient does have chronic heart failure.