Based on prior knowledge, the relationship between the ALT_BLOOD feature and the presence of chronic heart failure can be described as follows:
- Chronic heart failure is often associated with elevated serum ALT levels. Thus, higher values of ALT_BLOOD are more likely to be observed in patients with chronic heart failure.
- However, it is important to note that the ALT_BLOOD feature alone may not be sufficient to determine the presence of chronic heart failure accurately. A comprehensive analysis considering other relevant features and medical history is necessary.

Based on this analysis, the dictionary showing the relationship between ALT_BLOOD and the presence of chronic heart failure is as follows:

```json
{
	"no": [10.5, 12.3, 9.8, 11.2, 9.1],  
	"yes": [18.6, 15.9, 17.3, 16.1, 14.2] 
}
```

These values are hypothetical and only serve as examples. In practice, the ranges of ALT_BLOOD values associated with "no" and "yes" classes should be determined based on domain knowledge and statistical analysis of the dataset.