Based on my prior knowledge, paroxysms of atrial fibrillation in the anamnesis (feature: nr_03) can be related to chronic heart failure. Atrial fibrillation is a common complication of chronic heart failure, and it can significantly increase the risk of myocardial infarction.

To analyze the relationship between feature nr_03 and the presence of chronic heart failure, let's consider the possible values of nr_03 and their association with the target variable:

- If nr_03 is "yes," it suggests a history of paroxysms of atrial fibrillation in the anamnesis, which might be indicative of a higher likelihood of chronic heart failure.
- If nr_03 is "no," it implies the absence of paroxysms of atrial fibrillation in the anamnesis, which may indicate a lower likelihood of chronic heart failure.

Based on this analysis, the dictionary representing the relationship between feature nr_03 and the presence of chronic heart failure can be defined as follows:

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

Note that the dictionary lists all possible values of feature nr_03 for each target class to consider all scenarios. For feature nr_03, there are only two possible categories: "no" and "yes."