Based on prior knowledge, we would expect that patients who have experienced myocardial infarction complications may be more likely to develop chronic heart failure. Let's analyze the relationship between the feature SVT_POST and the target class chronic heart failure to create the dictionary.

To do this, we can examine the SVT_POST feature for patients who have chronic heart failure and those who do not.

Here is the dictionary that indicates the possible values of the SVT_POST feature for each target class:

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

According to the analysis, patients who have chronic heart failure may have experienced paroxysms of supraventricular tachycardia at the time of admission to the intensive care unit, as indicated by the values "no" and "yes" for the SVT_POST feature. Patients without chronic heart failure, on the other hand, only have the value "no" for the SVT_POST feature.

Please note that there might be additional values for SVT_POST that are hard to predict, but since they were not observed in the given data, we did not include them in the dictionary.