Reverse left ventricular (LV) remodeling and recovery of LV function are
 associated with improved clinical outcomes in patients with heart 
failure with reduced ejection fraction. A growing body of evidence 
suggests that even among patients who experience a complete 
normalization of LV ejection fraction, a significant proportion will 
develop recurrent LV dysfunction accompanied by recurrent heart failure 
events. This has led to intense interest in understanding how to manage 
patients with heart failure with recovered ejection fraction (HFrecEF). 
Because of the lack of a standard definition for HFrecEF, and the 
paucity of clinical data with respect to the natural history of HFrecEF 
patients, there are no current guidelines on how these patients should 
be followed up and managed. Accordingly, thisJACCScientific 
Expert Panel reviews the biology of reverse LV remodeling and the 
clinical course of patients with HFrecEF, as well as provides guidelines
 for defining, diagnosing, and managing patients with HFrecEF.