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

Based on the feature description, the n_p_ecg_p_11 feature has two categories: "no" and "yes". To analyze how this feature relates to the task of determining chronic heart failure, we need to examine if there is a pattern or correlation between the categories of this feature and the presence or absence of chronic heart failure.

From the given feature description alone, it is not possible to directly determine if a patient has chronic heart failure. Therefore, we cannot definitively state how the categories of this feature (n_p_ecg_p_11) would be related to the presence or absence of chronic heart failure. It is not possible to include specific values in the dictionary without additional information.

Therefore, the dictionary includes the two possible values of this feature ("no" and "yes") as per the given description, but it is not possible to provide a more detailed analysis without further information.