Based on my prior knowledge, Paroxysms of ventricular tachycardia at the time of admission to the intensive care unit (GT_POST) can be related to chronic heart failure. Ventricular tachycardia is a type of abnormal heart rhythm that can indicate heart problems. Therefore, there might be a relationship between GT_POST and the presence of chronic heart failure.

To analyze the relationship, we can look at the GT_POST values for the patients with and without chronic heart failure. We need data that includes both the GT_POST feature and the chronic heart failure target variable.

Here is an example dictionary that represents the possible values of GT_POST for the different target classes:

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

In this example, the GT_POST feature has two possible values: "no" and "yes". For the patients without chronic heart failure (target class "no"), all of them have GT_POST value "no". For the patients with chronic heart failure (target class "yes"), all of them have GT_POST value "yes".

Please note that this is just an example and the actual values may vary based on the dataset.