Based on my prior knowledge, I can analyze the relationship between the feature "n_p_ecg_p_08" and the presence of chronic heart failure.

LBBB (Left Bundle Branch Block) is a condition that affects the electrical conduction system of the heart. It causes a delay or blockage of electrical signals in the heart, which can be seen on an electrocardiogram (ECG). The presence of LBBB on an ECG can indicate underlying heart disease.

To determine if the patient has chronic heart failure, we need to consider if LBBB is present on the ECG at the time of admission to the hospital. It is important to note that while LBBB is associated with heart disease, it does not necessarily mean that the patient has chronic heart failure. Hence, we cannot make a definitive determination based solely on this feature. Other clinical factors and diagnostic tests may be required to confirm the presence of chronic heart failure.

Now, let's create the dictionary:

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

Since the feature "n_p_ecg_p_08" is a categorical variable with two categories, "no" and "yes", we include the possible values of this feature. In this case, since we don't have specific information regarding the possible values, we can assume that "no" and "yes" are the only valid options.