```json
{
    "no": ["no"],
    "yes": ["yes"]
}
```
Based on the given feature description and task, it seems that the feature TIKL_S_n represents the use of Ticlid medication in the ICU. 

From the given information, it is not possible to directly analyze the relationship between the feature and the presence of chronic heart failure in the patient. The feature does not provide any indication or measure related to chronic heart failure specifically.

However, the possible values for the feature TIKL_S_n are 'no' and 'yes'. As per the given task, we can assume that 'yes' indicates the use of Ticlid in the ICU, while 'no' indicates the absence of Ticlid usage in the ICU.

Therefore, the dictionary representing the feature TIKL_S_n and its relationship to the target class (chronic heart failure) is as follows:

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

Please note that this analysis assumes that the feature TIKL_S_n has a potential relationship with the target class but does not directly provide information about chronic heart failure. The dictionary represents the possible values for the feature TIKL_S_n in relation to the target class.