Now a days classification of heart failure includes a distinct type of heart failure known as heart failure with recovered ejection fraction. Takotsubo cardiomyopathy belongs to this class. And accordingly this type of heart failure requires to continue GDMT even after recovering from heart failure.
Dear Mohamed Magdi Eid, the following attached link entitled, "GDMT for heart failure and the clinician's conundrum."might help you, please have a look:
Article GDMT for heart failure and the clinician's conundrum