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. 2022 Jun;20(2):115-123.
doi: 10.1007/s12574-021-00559-0. Epub 2021 Nov 25.

Left atrial reverse remodeling predicts long-term survival after cardiac resynchronization therapy

Sjoerd Bouwmeester #  1 , Thomas P Mast #  2 , Daniëlle C J Keulards  2 , Anouk G W de Lepper  2 , Ingeborg H F Herold  3 , Lukas R Dekker  2   4 , Frits W Prinzen  5 , Patrick Houthuizen  2
Affiliations

Left atrial reverse remodeling predicts long-term survival after cardiac resynchronization therapy

Sjoerd Bouwmeester et al. J Echocardiogr. 2022 Jun.

Abstract

Background: Left ventricular (LV) reverse remodeling has been identified as a strong predictor of long-term survival in patients receiving CRT. Interestingly, CRT induces reverse remodeling in the left atrium (LA) as well. It is currently unknown to what extent LA reverse remodeling is correlated to long-term survival after CRT. This study aims to assess the long-term prognostic value of left atrium (LA) reverse remodeling in patients undergoing cardiac resynchronization therapy (CRT).

Methods: Baseline and 3-months follow-up echocardiograms after CRT implantation were prospectively assessed to determine changes in left ventricular end-systolic volume (LVESV), left ventricular ejection fraction (LVEF), left atrial volume (LAV), and left atrial reservoir strain (LASr). Multivariate Cox regression analysis was performed to identify predictors for long-term survival.

Results: In our study population of 99 patients with a mean follow-up of 6.3 ± 2.1 years, 43 patients (43%) reached the end-point of all-cause mortality. More extensive LA reverse remodeling, as measured by a relative increase in LASr, was observed in survivors compared to non-survivors (43 [29-64] % vs. 8 [2-28] %, P < 0.001, respectively). After multivariate analysis, delta LASr remained the only significant predictor of mortality [HR per 5%: 0.90 (0.86-0.95); AUC 0.78 (0.68-0.88)].

Conclusion: An increase in LASr is associated with favorable long-term outcome after CRT. The observed clinical importance of LA reverse remodeling after CRT asks for further validation in larger prospective cohorts.

Keywords: Bundle branch block; Cardiac resynchronization therapy; Heart failure; Left atrial reverse remodeling; Left atrial strain; Left ventricular reverse remodeling.

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