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Erschienen in: Pediatric Cardiology 2/2013

01.02.2013 | Original Article

5/6 Area Length Method for Left-Ventricular Ejection-Fraction Measurement in Adults with Repaired Tetralogy of Fallot: Comparison with Cardiovascular Magnetic Resonance

verfasst von: Jimmy C. Lu, Gregory J. Ensing, Sunkyung Yu, Thor Thorsson, Janet E. Donohue, Adam L. Dorfman

Erschienen in: Pediatric Cardiology | Ausgabe 2/2013

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Abstract

In patients with repaired tetralogy of Fallot (rTOF), left-ventricular ejection fraction (LVEF) predicts adverse outcomes. Two-dimensional echocardiographic (2DE) methods of measuring LVEF require geometric assumptions and may be limited in this population due to altered ventricular geometry. This study evaluated the performance of the 5/6 area × length (AL) method in this population as well as which factors limit agreement with the results of cardiovascular magnetic resonance (CMR). In 20 patients with rTOF (28.5 ± 14.7 years old) and CMR and 2DE within 3 months, two investigators blinded to CMR measured LVEF from 2DE by the AL method, biplane Simpson’s (BiS) method, and visual estimate. Two investigators blinded to 2DE measured LVEF from CMR by Simpson’s and AL methods. The AL method on 2DE more closely approximated LVEF by CMR (r = 0.73, p = 0.0003) than BiS method (r = 0.53, p = 0.02). AL method was not limited by geometric assumptions, as AL method on CMR closely approximated Simpson’s method on CMR (r = 0.90, p < 0.0001) despite median left-ventricular diastolic eccentricity index of 1.24. AL method on 2DE was primarily limited by short-axis area measurement rather than foreshortening of the ventricle. In conclusion, in adults with rTOF, AL method on 2DE moderately approximates LVEF by CMR, even in the context of altered left-ventricular geometry. Although the AL method may be the most appropriate 2DE method in this population, significant limitations remain for LVEF assessment by 2DE, and strategies to optimize image position and border detection are essential.
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Metadaten
Titel
5/6 Area Length Method for Left-Ventricular Ejection-Fraction Measurement in Adults with Repaired Tetralogy of Fallot: Comparison with Cardiovascular Magnetic Resonance
verfasst von
Jimmy C. Lu
Gregory J. Ensing
Sunkyung Yu
Thor Thorsson
Janet E. Donohue
Adam L. Dorfman
Publikationsdatum
01.02.2013
Verlag
Springer-Verlag
Erschienen in
Pediatric Cardiology / Ausgabe 2/2013
Print ISSN: 0172-0643
Elektronische ISSN: 1432-1971
DOI
https://doi.org/10.1007/s00246-012-0420-7

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