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

Based on the given feature description, the feature "IM_PG_P" represents the presence of a right ventricular myocardial infarction. The possible values for this feature are "no" and "yes". 

To determine if the patient has chronic heart failure, we need to analyze the relationship between the feature "IM_PG_P" and the target variable "myocardial infarction complications". 

Since the target variable specifically asks about chronic heart failure, we can assume that if the patient has a right ventricular myocardial infarction, it may contribute to the development of chronic heart failure. Therefore, if the value of "IM_PG_P" is "yes", it is likely that the patient has chronic heart failure.

The dictionary provided in the output reflects this analysis. The "no" class has the feature value "no" and the "yes" class has the feature value "yes".