Based on prior knowledge, to analyze the relationship between the feature "ritm_ecg_p_07" and the task of determining whether the patient shows chronic heart failure, we can consider the following:

1. Patients with sinus rhythm (ECG rhythm at the time of admission to hospital) typically have a regular heart rate.
2. A heart rate above 90 beats per minute (bpm) is considered tachycardia, which may be associated with certain conditions including heart failure.

To create the dictionary with the requested format, we need to determine the possible values of "ritm_ecg_p_07" for each target class (yes and no).

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

Since the feature "ritm_ecg_p_07" is a categorical variable with two categories ("no" and "yes"), we can assign these values directly to the corresponding target classes.

Note: The analysis provided is based on general knowledge and assumptions. More specific information about the dataset and its relationship with the target variable would be necessary for a more accurate analysis.