```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```
Based on the feature description, the feature "n_r_ecg_p_02" represents the presence or absence of frequent premature atrial contractions on ECG at the time of admission to the hospital. 

In this case, since we are looking to determine if the patient has chronic heart failure, the presence or absence of frequent premature atrial contractions could potentially be indicative of chronic heart failure. 

However, without any additional information or analysis, it is difficult to predict the values of "n_r_ecg_p_02" for the target class "yes" (chronic heart failure). Therefore, the only possible value for the target class "no" (no chronic heart failure) is "no", and the only possible value for the target class "yes" is "yes".

Hence, the dictionary is as follows:
```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```