Based on the given feature description, we are analyzing the relationship between the feature "GEPAR_S_n" (use of anticoagulants in the ICU) and the task of determining whether the patient has chronic heart failure.

To analyze this relationship, we can examine the distribution of GEPAR_S_n values for each target class (yes or no for chronic heart failure). Based on this analysis, we can create a dictionary with the GEPAR_S_n values for each target class.

Here is the dictionary:

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

In this case, both target classes have the same possible GEPAR_S_n values, which are "yes" and "no".