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

Based on the information provided, the feature "fibr_ter_01" can only take two values: "no" and "yes". Both values are directly mapped to the target class of chronic heart failure. Therefore, the possible values of the feature for the target class "no" are ["no"], and for the target class "yes" are ["yes"].