Risk factors for hospital readmission in adult patients with heart failure with reduced ejection fraction: a systematic review.

This review provides a comprehensive overview of factors associated with a clinical outcome after a HF hospitalization in patients with HF with LVEF ≤ 40%. Owing to the heterogeneity of variables investigated and the lack of comparability of findings, the clinical impact of the identified risk factors remains uncertain. This review highlights research gaps and the need for a standardized way to define and measure all-cause readmission, HF readmission, and composite end points in clinical research to improve study quality and enable comparison of findings between studies.