```json
{
	"no": ["no"], 
	"yes": ["yes"]
}
```
Based on the given feature "MP_TP_POST" and the task of determining if the patient has chronic heart failure, we can see that the feature is indicating whether the patient had paroxysms of atrial fibrillation at the time of admission to the intensive care unit or at a prehospital stage. 

From the feature description, we can infer that the feature "MP_TP_POST" has two possible values: "no" and "yes". 

As per the task, we need to determine if the patient has chronic heart failure. There is no specific information provided on how the feature "MP_TP_POST" is related to chronic heart failure. Without any prior knowledge or additional information, it is difficult to conclude how the feature relates to the target variable.

Therefore, the dictionary includes all possible values of the feature "MP_TP_POST" for both target classes "no" and "yes".