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

Based on the given feature, "np_08" which indicates the presence of Complete LBBB (Left Bundle Branch Block) in the patient's medical history, we can analyze its relationship with the task of determining whether the patient has chronic heart failure complications.

In this case, since "np_08" has only two categories, "no" and "yes", we can conclude that if the value of "np_08" is "no", it implies that the patient does not have Complete LBBB in the anamnesis, and therefore it is unlikely for them to have chronic heart failure complications. On the other hand, if the value of "np_08" is "yes", it indicates the presence of Complete LBBB in the anamnesis, which may increase the probability of chronic heart failure complications.

However, since the question is only asking for a simple yes or no answer, the analysis of the relationship between "np_08" and chronic heart failure complications can be simplified to whether "np_08" is "no" or "yes". Hence, we can create a dictionary with the two possible values of "np_08" and their respective target classes.

Note: It is not necessary to include any other values of "np_08" in the dictionary, as the question only asks for a yes or no answer.