Based on my prior knowledge, AST_BLOOD refers to the serum AsAT (Aspartate Aminotransferase) content in the blood. To analyze the relationship between AST_BLOOD and chronic heart failure in myocardial infarction complications, we can consider the typical ranges of AST_BLOOD values for each target class and identify potential patterns.

Since the task requires determining whether the patient shows chronic heart failure or not, we need to analyze the range of AST_BLOOD values for both cases ('no' and 'yes'). Let's assume that 'no' represents patients without chronic heart failure and 'yes' represents patients with chronic heart failure.

Here is a dictionary with 5 typical AST_BLOOD values for each target class:

```json
{
	"no": [18.5, 22.9, 26.2, 30.1, 34.8],
	"yes": [28.4, 32.7, 36.5, 40.2, 43.6]
}
```

Please note that these values are purely hypothetical and may not represent actual clinical ranges. Actual analysis should be based on real data and domain expertise.