Based on prior knowledge, Complete LBBB in the anamnesis (np_08) is a categorical variable representing the presence or absence of Left Bundle Branch Block (LBBB) in the past medical history of the patient. 

To determine if the myocardial infarction complications data of this patient show chronic heart failure, we need to analyze the relationship between np_08 and the target variable. 

To do this, we should look at the distribution of np_08 values for both the positive and negative cases of chronic heart failure in the dataset.

The dictionary for this analysis would look like:

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

Explanation:

- For the "no" class of chronic heart failure, the possible values for np_08 are only "no".
- For the "yes" class of chronic heart failure, the possible values for np_08 are "no" and "yes".

It is important to note that the "yes" class includes both "no" and "yes" values. This means that patients with both past absence and presence of LBBB could have chronic heart failure. However, the "no" class only includes patients with a past absence of LBBB.