Based on my prior knowledge, the use of Fibrinolytic therapy by Streptodecase 1.5m IU (fibr_ter_08) may have an impact on the occurrence of chronic heart failure. To analyze the relationship between the feature and the task, we can examine the distribution of fibr_ter_08 values for each target class (chronic heart failure yes/no).

Here is the analysis:

Target Class: yes (chronic heart failure)
- Possible values of fibr_ter_08: ['no', 'yes'] (categorical variable)
- The values of fibr_ter_08 for patients with chronic heart failure are: ['no', 'yes']

Target Class: no (no chronic heart failure)
- Possible values of fibr_ter_08: ['no', 'yes'] (categorical variable)
- The values of fibr_ter_08 for patients without chronic heart failure are: ['no', 'yes']

Based on the analysis, the possible values of fibr_ter_08 for each target class are as follows:

```json
{
	"no": ["no", "yes"],
	"yes": ["no", "yes"]
}
```
This indicates that both target classes have the same possible values for the fibr_ter_08 feature.

Please note that the given feature and task description do not provide any information regarding the relationship between the feature fibr_ter_08 and the occurrence of chronic heart failure. The analysis presented here only indicates the possible values for the feature in each target class.