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Early detection of subclinical ventricular deterioration in aortic stenosis with cardiovascular magnetic resonance and echocardiography

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Authors
Lee, Seung-Pyo; Park, Sung-Ji; Kim, Yong-Jin; Chang, Sung-A; Park, Eun-Ah; Kim, Hyung-Kwan; Lee, Whal; Lee, Sang-Chol; Park, Seung Woo; Sohn, Dae-Won; Choe, Yeon-Hyeon
Issue Date
2013-08-28
Publisher
BioMed Central
Citation
Journal of Cardiovascular Magnetic Resonance, 15(1):72
Keywords
Aortic stenosisCardiovascular magnetic resonanceHeart functionEchocardiographyVentricular remodelingMagnetic resonance imagingMyocardial functionMyocardial fibrosis
Description
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background: Severe aortic stenosis (AS) patients with late gadolinium enhancement (LGE) on cardiovascular magnetic resonance (CMR) or left ventricular (LV) systolic dysfunction are known to have worse outcome. We aimed to investigate whether LGE on CMR would be useful in early detection of subclinical LV structural and functional derangements in AS patients. Methods: 118 patients with moderate to severe AS were prospectively enrolled. Echocardiography and CMR images were taken and the patients were divided into groups according to the presence/absence of LGE and of LV systolic dysfunction (LV ejection fraction (EF) <50%). The stiffness of LV was calculated based on Doppler and CMR measurements.
Results: Patients were grouped into either group 1, no LGE and normal LVEF, group 2, LGE but normal LVEF and group 3, LGE with depressed LVEF. There was a significant trend towards increasing LV volumes, worsening of LV diastolic function (E/e’, diastolic elastance), systolic function (end-systolic elastance) and LV hypertrophy between the three groups, which coincided with worsening functional capacity (all p-value < 0.001 for trend). Also, significant differences in the above parameters were noted between group 1 and 2 (E/e’, 14.6 ± 4.3 (mean ± standard
deviation) in group 1 vs. 18.2 ± 9.4 in group 2; end-systolic elastance, 3.24 ± 2.31 in group 1 vs. 2.38 ± 1.16 in group 2, all p-value < 0.05). The amount of myocardial fibrosis on CMR correlated with parameters of diastolic (diastolic elastance, Spearman’s ρ = 0.256, p-value = 0.005) and systolic function (end-systolic elastance, Spearman’s ρ = −0.359, p-value < 0.001).
Conclusions: These findings demonstrate the usefulness of CMR for early detection of subclinical LV structural and functional deterioration in AS patients.
Language
English
URI
http://hdl.handle.net/10371/93533
DOI
https://doi.org/10.1186/1532-429X-15-72
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College of Medicine/School of Medicine (의과대학/대학원)Thoracic Surgery (흉부외과학전공)Journal Papers (저널논문_흉부외과학전공)
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