Based on the given feature, i.e., the presence of essential hypertension, and the task of determining whether the patient shows chronic heart failure, a thorough analysis can be conducted.

Since essential hypertension is a risk factor for chronic heart failure, it is likely that patients with a higher stage of essential hypertension (Stage 2 or above) are more prone to developing chronic heart failure. Therefore, these stages may be indicative of chronic heart failure. However, patients with no essential hypertension or with Stage 1 hypertension may or may not develop chronic heart failure.

Based on this analysis, the dictionary can be generated as follows:

```json
{
	"no": ["there is no essential hypertension", "Stage 1"],
	"yes": ["Stage 2", "Stage 3"]
}
```

Please note that the list of values for each target class may vary depending on the specific dataset and its characteristics.