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

Based on the given feature description, the feature zab_leg_03 represents whether the patient has bronchial asthma in their medical history. In order to determine if this feature is related to the target variable of chronic heart failure, we need to analyze the relationship between zab_leg_03 and the presence of chronic heart failure in patients.

Since the feature zab_leg_03 is a categorical variable with two categories ('no', 'yes'), we can examine the distribution of these categories for each target class separately.

By analyzing the data, we find that if the patient has chronic heart failure, there is no information available about their bronchial asthma status in the anamnesis. Thus, the feature zab_leg_03 does not provide any useful information in determining whether a patient with myocardial infarction complications has chronic heart failure.

As the possible values of the feature zab_leg_03 are already presented in the dictionary, there is no need to include any additional values.