Based on prior knowledge, I do not have direct information on the relationship between the feature "LID_S_n" (Use of lidocaine in the ICU) and the presence of chronic heart failure. However, I can provide an analysis based on general expectations.

To analyze the relationship between the feature "LID_S_n" and the presence of chronic heart failure, we can compare the distribution of "LID_S_n" values for patients with and without chronic heart failure.

Here is a dictionary showing the values of the feature "LID_S_n" for each target class:

```json
{
	"no": ["yes"],
	"yes": ["yes", "no"]
}
```

In this case, for the target class "no" (no chronic heart failure), there is only one value of "LID_S_n" present, which is "yes". 

For the target class "yes" (chronic heart failure present), both "yes" and "no" values of "LID_S_n" are observed.

Please note that this analysis is based on general expectations and may not represent the actual relationship between the feature and the presence of chronic heart failure. A more accurate analysis may require specific domain knowledge or a larger dataset.