Based on the given feature description, we can analyze the relationship between the feature ZSN_A and the presence of chronic heart failure in the myocardial infarction complications data.

Analyzing the feature ZSN_A, we can see that it represents the presence of chronic heart failure in the patient's medical history. The categories for this feature include:

1. "there is no chronic heart failure"
2. "I stage"
3. "IIА stage"
4. "IIB stage"

To determine whether the myocardial infarction complications data of this patient shows chronic heart failure, we need to examine the relationship between the feature values and the target variable (presence of chronic heart failure).

To create the dictionary, we will categorize the feature values based on the target variable:

```json
{
    "no": ["there is no chronic heart failure"],
    "yes": ["I stage", "IIА stage", "IIB stage"]
}
```

The feature value "there is no chronic heart failure" is categorized under the "no" class, indicating the absence of chronic heart failure. The feature values "I stage", "IIА stage", and "IIB stage" are categorized under the "yes" class, indicating the presence of chronic heart failure.

Note: It is assumed that the given feature categories cover all the relevant possibilities and no other categories exist.