Based on prior knowledge, the feature "endocr_01" is diabetes mellitus in the anamnesis. Diabetes mellitus is a risk factor for various cardiovascular diseases, including myocardial infarction and chronic heart failure. Therefore, it is reasonable to assume that diabetes mellitus in the anamnesis could potentially be an indicator of chronic heart failure in this patient.

To analyze the relationship between the feature "endocr_01" and the task of determining whether the patient has chronic heart failure, we need to examine the distribution of "endocr_01" values for each target class (yes or no) in the myocardial infarction complications data.

Here is a dictionary summarizing the possible values of the feature "endocr_01" for each target class:

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

Based on the available data, patients without chronic heart failure (target class: "no") have a value of "no" for the feature "endocr_01", indicating that they do not have diabetes mellitus in the anamnesis. On the other hand, patients with chronic heart failure (target class: "yes") can have either "no" or "yes" as the value for the feature "endocr_01", indicating that some patients with chronic heart failure have diabetes mellitus in the anamnesis, while others do not.

Keep in mind that this analysis is based on the available data and may not be applicable to all cases.