Based on prior knowledge, ventricular contractions on ECG at the time of admission to the hospital (n_r_ecg_p_03) may be correlated with chronic heart failure. Let's analyze the relationship between this feature and the task of determining if the patient has chronic heart failure.

To analyze the relationship, we can examine the distribution of n_r_ecg_p_03 values for each target class (yes and no) in the myocardial infarction complications data.

Based on this analysis, the dictionary for this feature and task would look like:

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

Since the description of the feature doesn't provide any specific details on the relationship between n_r_ecg_p_03 and chronic heart failure, we are assuming that both "no" and "yes" values of n_r_ecg_p_03 are possible for both target classes.