Based on prior knowledge, there is a known association between atrial fibrillation (ritm_ecg_p_02 = 'yes') and chronic heart failure. Atrial fibrillation is a common cause of heart failure and can contribute to the development and progression of chronic heart failure.

Here is the dictionary based on the analysis:

```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```

Since the feature is categorical and has only two possible values ('no' and 'yes'), there is no need to include additional values in the dictionary.