Impact of Advanced Heart Failure Duration on Left Ventricular Functional Improvement After Left Ventricular Assist Device Implantation.

Left ventricular recovery (LV) in patients with advanced heart failure (HF) supported by a durable left ventricular assist device (LVAD) is uncommon but clinically significant. There is limited understanding on the timing of LV recovery in relation to LVAD implantation. A total of 383 HF patients who underwent LVAD implantation were evaluated for LV functional improvement defined as an absolute increase in left ventricular ejection fraction (LVEF) of greater than or equal to 20% post-LVAD placement. Out of 383 LVAD patients, 39 (10.1%) demonstrated significant LV improvement. Among these, 25 (64%) patients had received LVAD less than or equal to 1 year of HF diagnosis, whereas 14 (36%) patients were implanted greater than 1 year from HF diagnosis. No significant differences in baseline imaging or hemodynamics were found between these two groups. The timing of LVAD implantation and time from LVAD to LVEF improvement was not associated with 5 year outcomes. Survival, free from HF relapse or transplant was 59% in the less than or equal to 1 year and 46% in greater than 1 year HF duration groups (p = 0.83). Thus, LV functional improvement can occur across a broad spectrum of HF duration, suggesting that the potential for recovery is not limited to those with newly diagnosed disease.