Study design. Blood samples for the assessment of NT-proBNP plasma levels will be obtained in all the patients at at least two time intervals: pre-discharge (e.g. 24 to 72 hours before the planned date of discharge) and at discharge (e.g. at the day of discharge). Pre-discharge samples will be taken when the patient is clinically stable, on the same oral drugs and at the same doses which are planned to be administered after discharge.