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

Based on the feature description, it seems that the `n_p_ecg_p_09` feature represents whether the patient has Incomplete LBBB on ECG at the time of admission to the hospital. The feature is a categorical variable with two possible values: "no" and "yes".

To analyze the relationship between this feature and the presence of chronic heart failure, we need to examine the data and see if there is any clear pattern or correlation. However, without any further information or data, it is impossible to draw any conclusions about the relationship between this feature and the presence of chronic heart failure.

Since there is no information provided about the relationship between the feature and the target, and we do not have any data to analyze, the dictionary only includes the possible values for the feature in each target class.