```json
{
    "no": ["no"],
    "yes": ["yes"]
}
```
Based on the feature description, n_r_ecg_p_06 represents a categorical variable with two possible values: 'no' and 'yes'. In this case, we can directly map the feature values to the target classes 'no' and 'yes'. Since the feature has only two possible values, we include both of them in the dictionary. For the target class 'no', the only possible value for n_r_ecg_p_06 is 'no'. Similarly, for the target class 'yes', the only possible value for n_r_ecg_p_06 is 'yes'.