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

Based on the feature description, the feature "nr_01" represents the presence or absence of premature atrial contractions in the patient's medical history. 

To analyze the relationship between this feature and the presence of chronic heart failure, we need to consider how premature atrial contractions may be related to chronic heart failure. 

Premature atrial contractions are early, extra heartbeats that originate in the atria (upper chambers of the heart) and occur before the regular heartbeat. While they can occur in individuals without heart conditions, frequent or repetitive premature atrial contractions can be related to underlying heart conditions or heart disease. 

Chronic heart failure is a condition where the heart is unable to pump blood efficiently, leading to symptoms such as shortness of breath, fatigue, and fluid retention. It can be caused by various factors, including coronary artery disease, heart attack, and hypertension. 

Now, let's associate the feature "nr_01" with the presence or absence of chronic heart failure. 

From the given feature description, we can see that the feature "nr_01" is a categorical variable with two categories: "no" and "yes". 

To determine if the myocardial infarction complications data of a patient show chronic heart failure, we need to analyze the occurrence of premature atrial contractions (nr_01) in the context of chronic heart failure. 

Based on the available information, we can make the following observations:

- When the value of the feature "nr_01" is "no", it indicates that there are no premature atrial contractions in the patient's medical history. This suggests that the patient does not have a previous occurrence of premature atrial contractions, which may be related to a lower risk of chronic heart failure.

- When the value of the feature "nr_01" is "yes", it indicates that there is a history of premature atrial contractions in the patient's medical records. This suggests that the patient has experienced premature atrial contractions in the past, which may be associated with a relatively higher risk of chronic heart failure.

Based on this analysis, we can see that the presence or absence of premature atrial contractions (nr_01) can provide some insights into the likelihood of chronic heart failure. 

Considering that the feature "nr_01" has only two possible values ("no" and "yes"), the dictionary representation of this relationship can be:

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

This dictionary indicates that for the target class "no" (indicating the absence of chronic heart failure), the possible value of the feature "nr_01" is "no". For the target class "yes" (indicating the presence of chronic heart failure), the possible value of the feature "nr_01" is "yes".

Please note that this analysis is based on the provided feature description, and the specific findings may vary depending on the context and dataset.