```json
{
	"no": [10.2, 12.5, 14.8, 16.3, 18.9],
	"yes": [22.1, 24.6, 26.9, 28.7, 31.2]
}
```
Based on my prior knowledge, the appropriate ranges for AST_BLOOD in the context of myocardial infarction complications are as follows:

- For patients without chronic heart failure (target class "no"), typical values of AST_BLOOD could be around 10.2, 12.5, 14.8, 16.3, and 18.9.
- For patients with chronic heart failure (target class "yes"), typical values of AST_BLOOD could be around 22.1, 24.6, 26.9, 28.7, and 31.2.

Please note that these values are hypothetical and may vary based on the specific dataset and medical guidelines.