Abstract
To the Editor: We read with interest the article published by Dunlay et al,1 where the authors examined the longitudinal trajectories of left ventricular ejection fraction in a community-based population of patients with heart failure. For the analysis, the population was stratified by preserved and reduced ejection fraction. As an additional aim, the estimated ejection fraction trajectories were related with mortality using time-varying Cox proportional hazard. We believe the topic is interesting by …
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