Andrea Barison1, Luna Gargani2, Daniele De Marchi3, Giovanni Donato Aquaro3, Serena Guiducci4, Eugenio Picano2, Marco Matucci Cerinic4, Alessandro Pingitore5. 1. Fondazione Toscana 'Gabriele Monasterio', CNR, Regione Toscana, Pisa, Italy Institute of Life Sciences, Scuola Superiore 'Sant'Anna', Pisa, Italy. 2. Clinical Physiology Institute, National Research Council, CNR, Pisa, Italy. 3. Fondazione Toscana 'Gabriele Monasterio', CNR, Regione Toscana, Pisa, Italy. 4. Department of Rheumatology, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Italy. 5. Clinical Physiology Institute, National Research Council, CNR, Pisa, Italy pingi@ifc.cnr.it.
Abstract
AIMS: Systemic sclerosis (SSc) may induce cardiac fibrosis and systo-diastolic dysfunction. Cardiovascular magnetic resonance (CMR) can detect replacement myocardial fibrosis with late gadolinium enhancement (LGE) and interstitial myocardial fibrosis with T1 mapping techniques. The aim of the study was to detect subclinical cardiac involvement with CMR in paucisymptomatic SSc patients with no previous history of myocardial disease, comparing it with skeletal muscle remodelling. METHODS AND RESULTS: Thirty consecutive SSc patients (mean age: 51 ± 12 years, all women) and 10 healthy controls (mean age: 48 ± 15 years, all women) underwent clinical, biohumoral assessment, and CMR. Extracellular volume fraction (ECV) was calculated from pre- and post-contrast T1 values in the myocardium and skeletal muscle. Seventeen patients (57%) were asymptomatic, 13 (43%) paucisymptomatic (effort dyspnoea). All patients had normal biventricular volumes and systolic function, while LGE was present in seven patients (23%). Myocardial ECV was significantly increased in patients with SSc (30 ± 4%) than controls (28 ± 4%, P = 0.03), as was skeletal muscle ECV (23 ± 6% vs. 18 ± 4%, P < 0.01). Myocardial ECV did not differ between patients with and without LGE (P = NS) and showed no significant correlations with clinical data, biventricular volumes, systolic, or diastolic function. Overall, myocardial ECV showed a significant correlation with skeletal muscle ECV (R = 0.58, P < 0.001). CONCLUSION: SSc is associated not only with myocardial replacement fibrosis, as detected by LGE, but also with interstitial remodelling of the myocardium and skeletal muscles, as detected by an increased ECV also in patients with normal biventricular function, with potential diagnostic, prognostic, and therapeutic clinical implications. Published on behalf of the European Society of Cardiology. All rights reserved.
AIMS: Systemic sclerosis (SSc) may induce cardiac fibrosis and systo-diastolic dysfunction. Cardiovascular magnetic resonance (CMR) can detect replacement myocardial fibrosis with late gadolinium enhancement (LGE) and interstitial myocardial fibrosis with T1 mapping techniques. The aim of the study was to detect subclinical cardiac involvement with CMR in paucisymptomatic SSc patients with no previous history of myocardial disease, comparing it with skeletal muscle remodelling. METHODS AND RESULTS: Thirty consecutive SSc patients (mean age: 51 ± 12 years, all women) and 10 healthy controls (mean age: 48 ± 15 years, all women) underwent clinical, biohumoral assessment, and CMR. Extracellular volume fraction (ECV) was calculated from pre- and post-contrast T1 values in the myocardium and skeletal muscle. Seventeen patients (57%) were asymptomatic, 13 (43%) paucisymptomatic (effort dyspnoea). All patients had normal biventricular volumes and systolic function, while LGE was present in seven patients (23%). Myocardial ECV was significantly increased in patients with SSc (30 ± 4%) than controls (28 ± 4%, P = 0.03), as was skeletal muscle ECV (23 ± 6% vs. 18 ± 4%, P < 0.01). Myocardial ECV did not differ between patients with and without LGE (P = NS) and showed no significant correlations with clinical data, biventricular volumes, systolic, or diastolic function. Overall, myocardial ECV showed a significant correlation with skeletal muscle ECV (R = 0.58, P < 0.001). CONCLUSION: SSc is associated not only with myocardial replacement fibrosis, as detected by LGE, but also with interstitial remodelling of the myocardium and skeletal muscles, as detected by an increased ECV also in patients with normal biventricular function, with potential diagnostic, prognostic, and therapeutic clinical implications. Published on behalf of the European Society of Cardiology. All rights reserved.
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