Based on the given feature "n_r_ecg_p_06" and the task of determining whether the patient has chronic heart failure based on myocardial infarction complications, we can analyze the relationship between the feature and the target variable.

To do this, we can examine how different values of the feature, 'Persistent form of atrial fibrillation on ECG at the time of admission to hospital', are related to the presence or absence of chronic heart failure.

Let's analyze the possible values of the feature for each target class:

Target Class: No (indicating no chronic heart failure)
Possible values of feature "n_r_ecg_p_06": ['no']

Target Class: Yes (indicating chronic heart failure)
Possible values of feature "n_r_ecg_p_06": ['no', 'yes']

Based on our analysis, we can create the following dictionary:

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

This dictionary shows the possible values of the feature "n_r_ecg_p_06" for each target class.