Based on my prior knowledge, there could be a relationship between the presence of Complete LBBB (Left Bundle Branch Block) in the patient's medical history (feature np_08) and the occurrence of chronic heart failure in the myocardial infarction complications data.

To analyze this relationship, we can evaluate the different occurrences of Complete LBBB in the anamnesis (np_08) for the two target classes, chronic heart failure (yes) and absence of chronic heart failure (no).

Here's the dictionary based on the analysis:

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

Explanation:

- For the target class "no" (absence of chronic heart failure), the only possible value of np_08 is "no".
- For the target class "yes" (chronic heart failure), the only possible value of np_08 is "yes".

Please note that if there are other possible values for np_08 that are hard to predict in terms of their relationship with chronic heart failure, they are not included in the dictionary. However, it is ensured that each target class has at least one value associated with feature np_08.