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Focal myocardial fibrosis assessed by late gadolinium enhancement cardiovascular magnetic resonance in children and adolescents with dilated cardiomyopathy

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10.1186_s12968_015_0142_0.pdf (2.404Mb)
Date
2015
Author
Latus, Heiner
Gummel, Kerstin
Klingel, Karin
Moysich, Axel
Khalil, Markus
Mazhari, Nona
Bauer, Juergen
Kandolf, Reinhard
Schranz, Dietmar
Apitz, Christian
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http://dx.doi.org/10.22029/jlupub-8551
Abstract

BACKGROUND: Different patterns of late gadolinium enhancement (LGE) including mid-wall fibrosis using cardiovascular magnetic resonance (CMR) have been reported in adult patients presenting with non-ischemic dilated cardiomyopathy (DCM). In these studies, LGE was associated with pronounced LV remodelling and predicted adverse cardiac outcomes. ... Accordingly, the purpose of our study was to determine the presence and patterns of LGE in children and adolescents with DCM. METHODS: Patients <18years of age presenting with severe congestive heart failure who were admitted for evaluation of heart transplantation at our centre underwent CMR examination which consisted of ventricular functional analysis and assessment of LGE for detection of myocardial fibrosis. Ischemic DCM was excluded by coronary angiography, and right ventricular endomyocardial biopsies ruled out acute myocarditis.RESULTS:Thirty-one patients (mean age 2.1+/-4.2years) with severe LV dilatation (mean indexed LVEDV 136+/-48ml/m2) and LV dysfunction (mean LV-EF 23+/-8%) were examined. LGE was detected in 5 of the 31 patients (16%) appearing in various patterns characterized as mid-wall (n=1), focal patchy (n=1), RV insertion site (n=1) and transmural (n=2). Based on histopathological analysis, 4 of the 5 LGE positive patients had lymphocytic myocarditis, whereas one patient was diagnosed with idiopathic DCM. CONCLUSIONS: In children and adolescents with DCM, focal histologically proven myocardial fibrosis is rarely detected by LGE CMR despite marked LV dilatation and severely depressed LV function. LGE occurred in various patterns and mostly in patients with inflammatory cardiomyopathy. It remains unclear whether myocardial fibrosis in childhood DCM reflects different endogenous repair mechanisms that enable favourable reverse remodelling. Larger trials are needed to assess the prognostic implications of LGE in childhood DCM.

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https://doi.org/10.1186/s12968-015-0142-0
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