Based on my prior knowledge, the presence of an anterior myocardial infarction (ant_im) can be an important factor in determining the occurrence of chronic heart failure in a patient. However, it is important to note that I have limited knowledge about the specific relationship between the ant_im feature and the target variable without any actual data.

To create the dictionary, I will assume that there might be a relationship between the ant_im values and the occurrence of chronic heart failure. Here is an example dictionary based on this assumption:

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

Please note that this is a hypothetical example based on limited information. In reality, the actual relationship between the feature and target variable needs to be validated with appropriate data analysis techniques.