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Heart and Vessels

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01-09-2020 | Aortic Valve Replacement | Original Article

Preprocedural valvuloarterial impedance as a predictor of left ventricular ejection fraction improvement after transcatheter aortic valve replacement in patients with reduced left ventricular ejection fraction

Authors: Ikki Komatsu, Chari Hart, Jeffrey Lau, Christian Spies

Published in: Heart and Vessels | Issue 9/2020

Abstract

Background

Predictors of left ventricular ejection fraction (LVEF) improvement after transcatheter aortic valve replacement (TAVR) in patients with a preoperative reduced LVEF are limited.

Objectives

This study aimed to investigate the relationship between preprocedural valuvuloarterial impedance (ZVa), which represents the global LV afterload, and LVEF improvement after TAVR.

Methods

This was a single-center, retrospective study, which included patients with symptomatic aortic valve stenosis (AS) with a reduced baseline LVEF (< 50%) underwent TAVR. Based on the difference in the LVEF before and 1 month after the procedure, they were divided into two groups: improved group (≥ 10% improvement) and non-improved group (< 10% improvement or worsening). Preprocedural ZVa and clinical outcomes were then compared. ZVa was calculated using preprocedural transthoracic echocardiography data.

Results

Among 473 cases of TAVR performed from May 2012 to July 2017 at Queen’s Medical Center (Honolulu, HI, USA), 99 patients (improved group, n = 42; mean age 82.0 ± 8.6 years vs. non-improved group, n = 57, mean age 81.4 ± 9.5 years) were included. The improved group had a higher baseline ZVa {4.83 (4.15–6.89) mmHg/ml/m² vs. 4.04 (3.56–4.63) mmHg/ml/m², respectively, p = 0.0009} and prevalence of ZVa > 5 mmHg/ml/m² (45.2% vs. 17.5%, respectively, p = 0.0028). Multivariable analysis of predictors of LVEF improvement ≥ 10% at 1 month identified ZVa > 5 mmHg/ml/m² [odds ratio (OR): 3.31, 95% confidence interval (CI): 1.05–11.8] as a predictor. The improved group had a lower readmission rate due to heart failure than the non-improved group (log-rank test, p = 0.043).

Conclusion

In conclusion, Zva is a simple, noninvasive marker that shows promise as a predictor of LVEF improvement after TAVR in reduced LVEF patients.

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Title: Preprocedural valvuloarterial impedance as a predictor of left ventricular ejection fraction improvement after transcatheter aortic valve replacement in patients with reduced left ventricular ejection fraction
Authors: Ikki Komatsu
Chari Hart
Jeffrey Lau
Christian Spies
Publication date: 01-09-2020
Publisher: Springer Japan
Keywords: Aortic Valve Replacement
Transthoracic Echocardiography
Aortic Valve Stenosis
Aortic Valve Replacement
Aortic Valve Replacement
Published in: Heart and Vessels / Issue 9/2020
Print ISSN: 0910-8327
Electronic ISSN: 1615-2573
DOI: https://doi.org/10.1007/s00380-020-01591-3

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Objectives

Methods

Results

Conclusion

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