```json
{
    "no": ["no"],
    "yes": ["yes"]
}
```
Based on the given feature, it appears that the feature "n_p_ecg_p_08" represents the presence or absence of LBBB (anterior branch) on the ECG at the time of admission to the hospital. The feature is a categorical variable with two possible categories: "no" and "yes".

To determine if the patient's myocardial infarction complications data show chronic heart failure, we need to examine the relationship between the feature "n_p_ecg_p_08" and the target variable "chronic heart failure". However, the target variable is not provided, so it is not possible to analyze the relationship in this context.

Please provide the target variable related to the task, and I will be able to provide a more detailed analysis.