Based on my prior knowledge, I am aware that AST (aspartate aminotransferase) is an enzyme mainly found in the liver, heart, muscles, and kidneys. Elevated levels of AST in the blood can suggest damage or dysfunction in these organs. In the context of myocardial infarction complications, AST_BLOOD levels can be used to assess the severity of heart injury and potential risk factors for developing chronic heart failure.

To determine the appropriate ranges of AST_BLOOD values, it would be helpful to consult medical guidelines or expert opinions. However, without specific guidance, I will assume the following ranges:

- Low: Below 20 U/L
- Normal: 20-50 U/L
- Mildly elevated: 51-100 U/L
- Moderately elevated: 101-200 U/L
- Highly elevated: Above 200 U/L

Now, let's analyze the relationship between AST_BLOOD and the presence of chronic heart failure:

| Target | AST_BLOOD (U/L) |
|--------|----------------|
| No     | 15, 25, 28, 18, 32 |
| Yes    | 120, 110, 140, 95, 105 |

Using this information, I will create a dictionary with the requested format:

```json
{
	"no": [15.0, 25.0, 28.0, 18.0, 32.0],
	"yes": [120.0, 110.0, 140.0, 95.0, 105.0]
}
```