Based on prior knowledge, the presence of an anterior myocardial infarction can have an impact on the development of chronic heart failure. However, the description of the "ant_im" feature does not provide direct information about chronic heart failure. We need more information to determine the relationship between this feature and the presence of chronic heart failure.

Based on the given categorical variable values for "ant_im", we can construct the dictionary as follows:

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

In this case, we cannot determine the presence of chronic heart failure solely based on the "ant_im" feature. Additional features or information would be required to make that determination.