Based on my prior knowledge, I will analyze the relationship between the feature "post_im" and the occurrence of chronic heart failure in patients with myocardial infarction complications. 

Since the feature "post_im" describes the presence of a posterior myocardial infarction, it may have a relationship with chronic heart failure. However, without specific knowledge about the causes and manifestations of chronic heart failure, it is difficult to make an accurate prediction solely based on this feature.

To create the dictionary, I will assume that the presence of a posterior myocardial infarction may indicate a higher likelihood of chronic heart failure. Therefore, I will include the values of "post_im" that suggest some form of infarction or changes in the QRS complex, as they may be associated with chronic heart failure.

Based on this analysis, the dictionary will have the following format:

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

Please note that this is a generalized analysis, and more specific information about the relationship between "post_im" and chronic heart failure would be required for a more accurate prediction.