Based on prior knowledge, it is reasonable to assume that a persistent form of atrial fibrillation in the patient's anamnesis (nr_04) can be a risk factor for chronic heart failure. Therefore, it is likely that patients with a 'yes' value for nr_04 are more likely to show chronic heart failure complications compared to patients with a 'no' value.

To create the dictionary based on this analysis, we need to examine the values of feature nr_04 for each target class (yes and no) and list them accordingly.

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

In this case, the values for feature nr_04 are straightforward as it only has two categories: 'no' and 'yes'. Therefore, the lists for each target class contain only one value, which corresponds to the category itself.