Abstract
Dilated cardiomyopathy (DCM) is an inevitable complication of Duchenne muscular dystrophy (DMD). Late gadolinium enhancement (LGE) demonstrated by cardiac MRI occurs in DMD-related DCM, indicating myocyte death and remodeling. We conducted a retrospective chart review identifying DMD patients in our center between January 2009 and July 2013. Subjects were cohorted by presence of LGE before age 14. We excluded patients in whom we could not determine LGE status prior to age 14. We reviewed comprehensive clinical data. Of the 41 subjects with complete data, 15 demonstrated LGE before age 14 (“early LGE”) and 26 had no LGE by age 14 (“controls”). Those with early LGE exhibited a more rapid decline in LV fractional shortening (p = 0.028). Patients with early LGE were younger at age of initiation of ACE inhibition (p = 0.025), mineralocorticoid receptor antagonism (p = 0.0024), and beta-blockade (p = 0.0017), suggesting aggressive clinical management in response to abnormal MRI findings. There were no significant differences in LV dilation between the two groups (p = 0.1547). Early LGE was not associated with obesity (p = 0.32), age at loss of ambulation (p = 0.31), or heart rate (p-value > 0.8). Early onset of myocardial fibrosis as indicated by LGE on cardiac MRI is associated with earlier progression of cardiomyopathic changes despite earlier medication therapy. Identifying this risk factor, observed in 34% of our cohort during preadolescence, may guide medical therapy and early counseling about cardiomyopathy progression. We advocate for obtaining at least one MRI in patients with DMD prior to age 14 to risk stratify patients.
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The authors have no relevant financial or non-financial interests to disclose. Partial funding for statistics was obtained through the Division of Cardiology and the Pediatric Residency Program at Children’s Hospital Los Angeles.
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Dr. James collected the data, contributed to study design, carried out the initial analyses, drafted the initial manuscript, and reviewed and revised the manuscript. Dr. Menteer reviewed initial analysis, contributed to study design, and reviewed and significantly revised the manuscript. Drs. Lilith Moss and Durazo-Arvizu performed statistical analysis, wrote the section on statistics methodology, composed the figures and table design, and reviewed and revised the manuscript. Dr. Wood reviewed initial analysis, contributed to study design, wrote the section on imaging methodology, and reviewed and revised the manuscript. Drs. Ramos-Platt and Tiongson compiled genetic data and reviewed and revised the manuscript. Dr. Su conceptualized and designed the study, supervised data collection, reviewed initial analyses, coordinated statistical resources, and reviewed and significantly revised the manuscript.
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James, L., Menteer, J., Moss, L.C. et al. Early-Onset Late Gadolinium Enhancement is a Prognostic Factor for Duchenne Cardiomyopathy. Pediatr Cardiol 44, 433–440 (2023). https://doi.org/10.1007/s00246-022-02989-8
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DOI: https://doi.org/10.1007/s00246-022-02989-8