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Early-Onset Late Gadolinium Enhancement is a Prognostic Factor for Duchenne Cardiomyopathy

Lorraine James1, Jondavid Menteer2,3, Lilith C Moss4,3

  • 1Department of Pediatrics, Children's Hospital Los Angeles, 4650 Sunset Blvd, Los Angeles, CA, 90027, USA. ljames@luriechildrens.org.

Pediatric Cardiology
|September 3, 2022
PubMed

Insights

Early cardiac fibrosis in Duchenne muscular dystrophy (DMD) patients, detected by late gadolinium enhancement (LGE) on MRI before age 14, predicts faster cardiomyopathy progression. This finding suggests earlier risk stratification and intervention are crucial for managing DMD-related heart complications.

Area of Science:

  • Cardiology
  • Neuromuscular Disorders
  • Medical Imaging

Background:

  • Dilated cardiomyopathy (DCM) is a common and serious complication in Duchenne muscular dystrophy (DMD).
  • Late gadolinium enhancement (LGE) on cardiac MRI signifies myocyte death and cardiac remodeling in DMD-related DCM.
  • Early identification of cardiac involvement is critical for timely management.

Purpose of the Study:

  • To investigate the association between early myocardial fibrosis, indicated by LGE before age 14, and the progression of cardiomyopathy in DMD patients.
  • To determine if early LGE influences the rate of left ventricular functional decline and the need for earlier medical intervention.
  • To evaluate the utility of preadolescent cardiac MRI for risk stratification in DMD.

Main Methods:

  • Retrospective chart review of DMD patients between January 2009 and July 2013.
  • Cohort analysis based on the presence or absence of LGE on cardiac MRI before the age of 14.
  • Comprehensive clinical data review, including medication initiation and functional parameters.

Main Results:

  • 15 out of 41 DMD patients (34%) showed LGE before age 14 ('early LGE').
  • Patients with early LGE exhibited a significantly more rapid decline in left ventricular fractional shortening (p=0.028).
  • Early LGE was associated with younger age at initiation of ACE inhibitors (p=0.025), mineralocorticoid receptor antagonists (p=0.0024), and beta-blockers (p=0.0017).

Conclusions:

  • Early onset of myocardial fibrosis, detected by LGE on cardiac MRI, is linked to accelerated cardiomyopathy progression in DMD patients.
  • Despite earlier initiation of guideline-directed medical therapy in those with early LGE, cardiac function declined more rapidly.
  • Cardiac MRI before age 14 is recommended for risk stratification and guiding management in DMD patients to anticipate cardiomyopathy progression.
Keywords:
CardiomyopathyDuchenneGeneticsMRI

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