Based on my prior knowledge, it is difficult to determine the exact relationship between the feature "IM_PG_P" (Presence of a right ventricular myocardial infarction) and the target variable "chronic heart failure" without additional information or data analysis. However, we can still create a dictionary based on the available information:

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

Please note that this dictionary only includes the known possible values for the feature "IM_PG_P" associated with each target class. If there are other possible values that are hard to predict or not mentioned in the provided data, they are not included in the dictionary.