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

Based on the provided feature ("MP_TP_POST") and the task of determining if the myocardial infarction complications data shows chronic heart failure, there are two possible values for the feature: "no" and "yes". The dictionary above represents the relationship between the feature and the target variable. In this case, when the feature value is "no", it implies that there is no chronic heart failure. When the feature value is "yes", it suggests that there might be chronic heart failure present in the myocardial infarction complications data.