Abstract
T1 mapping using cardiac magnetic resonance (CMR) is useful for myocardial assessment. However, its prognostic value is not well defined. The aim of this study was to determine whether T1 mapping with CMR can predict reverse cardiac remodeling in patients with non-ischemic dilated cardiomyopathy (NIDCM). We also investigated the predictive prognostic value of T1 mapping with CMR in these patients. We included 33 patients with NIDCM admitted to Nippon Medical School Hospital between February 2012 and October 2015. All patients underwent CMR and echocardiography for clinical assessment within 1 month of admission (13 ± 16 days). Follow-up echocardiography was performed no sooner than 6 months after the initial echocardiogram (536 ± 304 days). We evaluated the correlations between native and post-contrast T1 values/extracellular volume fraction (ECV) and the difference in left ventricular ejection fraction (ΔLVEF) determined at baseline and follow-up echocardiography. No correlation was noted between ΔLVEF and native (p = 0.150, r = − 0.256) or post-contrast T1 values (p = 0.956, r = − 0.010). However, a significant and substantial correlation was found between ΔLVEF and ECV (p = 0.043, r = − 0.355). Four patients were hospitalized for heart failure (HF), but no cardiovascular-related deaths occurred over a median follow-up period of 34 months (interquartile range 25–49 months). Kaplan–Meier curves stratified by the median value of ECV were created. The higher ECV groups experienced a significantly higher incidence of HF-related hospitalization (p = 0.0159). ECV measured by CMR can predict improvements in LVEF in patients with NIDCM. In addition, ECV may be a predictive factor for HF-related hospitalization.
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Inui, K., Asai, K., Tachi, M. et al. Extracellular volume fraction assessed using cardiovascular magnetic resonance can predict improvement in left ventricular ejection fraction in patients with dilated cardiomyopathy. Heart Vessels 33, 1195–1203 (2018). https://doi.org/10.1007/s00380-018-1154-0
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DOI: https://doi.org/10.1007/s00380-018-1154-0