```json
{
	"no": ["no"], 
	"yes": ["yes"]
}
```
Since the feature n_r_ecg_p_02 is a categorical variable with two possible categories, namely "no" and "yes", the dictionary includes both categories for each target class. In this case, the values of the feature directly indicate whether the patient has frequent premature atrial contractions on ECG at the time of admission to the hospital or not.