AI Article Synopsis

  • This study examines how changes in heart rate influence the recovery of left ventricular ejection fraction (LVEF) in patients with heart failure that initially has reduced ejection (HFrEF).
  • Out of 398 patients who previously experienced heart failure, 138 with HFrEF were followed, leading to the identification of 64 patients who improved to heart failure with recovered ejection fraction (HFrecEF).
  • The results indicate that a significant decrease in heart rate after hospitalization is a strong predictor of LVEF recovery, independent of other health factors.

Article Abstract

Introduction: Predictors of heart failure with recovered ejection fraction (HFrecEF) remain to be fully elucidated. This study investigated the impact of heart rate and its change on the recovery of left ventricular ejection fraction (LVEF) in heart failure with reduced ejection fraction (HFrEF).

Material And Methods: From 398 outpatients who had a history of hospitalisation for heart failure, 138 subjects diagnosed as HFrEF (LVEF < 40%) on heart failure hospitalisation were enrolled and longitudinally surveyed. During follow-up periods more than one year, 64 and 46 patients were identified as HFrecEF (improved LVEF to ≥ 40% and its increase of ≥ 10 points) and persistent HFrEF, respectively.

Results: In the overall subjects, the reduction of heart rate through the observation periods was closely correlated with the improvement of LVEF (r = -0.508, p < 0.001). Heart rate on hospital admission for heart failure was markedly higher in patients with HFrecEF (112 ± 26 bpm) than in those with persistent HFrEF (90±18 bpm). Whereas heart rate at the first outpatient visit after discharge was already lower in the HFrecEF group (80 ± 13 vs. 85 ± 13 bpm in the persistent HFrEF group). A multivariate logistic regression analysis revealed that the decrease in heart rate from admission to the first visit after discharge was a significant determinant of HFrecEF (p < 0.001), independently of confounding factors such as ischemic heart disease and baseline LVEF and left ventricular dimension.

Conclusions: Our findings suggest that heart rate reduction in the early phase after heart failure onset is a powerful independent predictor of the subsequent recovery of LVEF in HFrEF patients.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11374335PMC
http://dx.doi.org/10.5603/cj.97021DOI Listing

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