Based on my prior knowledge, premature ventricular contractions (PVCs) are abnormal heart rhythms that can be seen on an electrocardiogram (ECG). PVCs can be symptomatic or asymptomatic and can be associated with various cardiac conditions. In the context of myocardial infarction complications, the presence of PVCs in the anamnesis could potentially indicate a higher risk of chronic heart failure.

Analyzing the relationship between the feature "nr_02" (Premature ventricular contractions in the anamnesis) and the task of determining whether the patient shows chronic heart failure, we can consider the following analysis:

1. If the feature value is "no", it suggests that the patient does not have a history of PVCs. This might indicate a lower likelihood of chronic heart failure. However, it does not completely rule out the possibility as other factors could contribute to the presence of chronic heart failure.

2. If the feature value is "yes", it suggests that the patient has reported PVCs in the anamnesis. This could indicate a potential association with chronic heart failure. However, further analysis or additional features might be required to confirm this relationship.

Based on these observations, the dictionary representing the relationship between the feature "nr_02" and the target variable of chronic heart failure would be:

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

Since the feature "nr_02" is a categorical variable with only two possible categories ('no' and 'yes'), the lists for each target class contain only the respective category value.