Based on the feature description and task, the feature "lat_im" represents the presence of a lateral myocardial infarction. The feature has five categories:

- "QRS has no changes"
- "there is no infarct in this location"
- "QRS is like Qr-complex"
- "QRS is like QS-complex"
- "QRS is like QR-complex"

To analyze the relationship between the feature and the task, we would need access to the myocardial infarction complications data for the patient. Without the data, it is difficult to determine how the feature "lat_im" relates to the presence of chronic heart failure.

However, based on the provided categories, we can create a dictionary that includes possible values of "lat_im" for each target class (yes and no). 

```json
{
    "no": ["QRS has no changes", "there is no infarct in this location"],
    "yes": ["QRS is like Qr-complex", "QRS is like QS-complex", "QRS is like QR-complex"]
}
```

Please note that this dictionary assumes that the provided feature categories are relevant to determining the presence of chronic heart failure. Without access to the actual data, this is the best analysis that can be provided.