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

Based on the feature description, the feature "n_r_ecg_p_01" represents premature atrial contractions on ECG at the time of admission to the hospital. It is a categorical variable with two possible categories: "no" and "yes".

Since the task is to determine whether the myocardial infarction complications data of this patient show chronic heart failure, it is important to analyze the relationship between the feature "n_r_ecg_p_01" and the presence of chronic heart failure.

Considering that the feature itself represents premature atrial contractions on ECG, it is reasonable to assume that the presence of premature atrial contractions ("yes" value) may indicate a higher likelihood of chronic heart failure. On the other hand, the absence of premature atrial contractions ("no" value) may indicate a lower likelihood of chronic heart failure.

Therefore, the dictionary representation for the feature "n_r_ecg_p_01" in relation to the task can be summarized as follows:

- For the target class "no" (indicating no chronic heart failure), the possible values of the feature "n_r_ecg_p_01" are ["no"].
- For the target class "yes" (indicating chronic heart failure), the possible values of the feature "n_r_ecg_p_01" are ["yes"].

The dictionary represents the relationship between the feature "n_r_ecg_p_01" and the target variable (presence of chronic heart failure).