Patient Characteristics
The baseline characteristics of the 1,178 patients with 3 or more EF measurements, who were included in this analysis, are shown in Tables 1 and 2. Compared to those without EF recovery, those with improvement in EF were more likely to be female, have non-ischemic cardiomyopathy, a QRS duration < 120 ms and a more recent heart failure diagnosis (Tables 1 and 2).