Based on prior knowledge, the relationship between the feature AST_BLOOD and the task of determining chronic heart failure can be analyzed as follows:

AST_BLOOD, which represents Serum AsAT content, is a laboratory measure that can indicate liver function and myocardial damage. In the context of myocardial infarction complications data, elevated AST_BLOOD levels could be an indicator of myocardial damage.

To determine the appropriate ranges of values for AST_BLOOD, further domain-specific knowledge would be required. However, in general, normal AST_BLOOD values for adults typically range from 10 to 40 units per liter (U/L). Values exceeding this range might indicate myocardial damage.

Based on this analysis, a dictionary can be created with typical AST_BLOOD values for each target class:

```json
{
	"no": [15.2, 18.5, 22.1, 29.9, 32.6],
	"yes": [41.7, 45.3, 55.9, 63.4, 72.8]
}
```

Please note that the provided values are merely examples and further analysis would be needed for a more accurate determination of the appropriate ranges.