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

Based on the feature description and the task, the feature "ritm_ecg_p_07" represents the ECG rhythm at the time of admission to the hospital. It is a categorical variable with two possible categories: "no" and "yes".

The target variable in this task is whether the patient shows chronic heart failure, which is a binary variable (Yes or No). 

Since the target variable is asking whether the patient has chronic heart failure or not, and the feature "ritm_ecg_p_07" represents the ECG rhythm, it may not be directly related to chronic heart failure. The possible values for the feature "ritm_ecg_p_07" are "no" and "yes", indicating the presence or absence of sinus with a heart rate above 90.

The relationship between the feature and the task is unclear without further information. A higher heart rate or a specific ECG rhythm might be associated with chronic heart failure, but it cannot be determined solely from the given feature description. Therefore, the values "no" and "yes" for the feature "ritm_ecg_p_07" should be included in the dictionary, as they represent the possible categories for this feature.