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Change in the ejection fraction (EF) between the first hospitalization for acute myocardial infarction and rehospitalization for acute decompensated heart failure in the three groups. HFmrEF, heart failure with mid‐range left ventricular ejection fraction; HFpEF, heart failure with preserved left ventricular ejection fraction; HFrEF, heart failure with reduced left ventricular ejection fraction.
