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Left ventricular noncompaction in Duchenne muscular dystrophy.

Statile CJ, Taylor MD, Mazur W, Cripe LH, King E, Pratt J, Benson DW, Hor KN - J Cardiovasc Magn Reson (2013)

Bottom Line: LVNC was defined as a diastolic NC/C ratio > 2.3 for any segment.Longitudinal data for 78 of the DMD boys demonstrated a mean rate of change in NC/C ratio per year of +0.36.The high prevalence of LVNC in DMD is associated with decreased LV systolic function that develops over time and may represent muscular degeneration versus compensatory remodeling.

View Article: PubMed Central - HTML - PubMed

Affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. Christopher.statile@cchmc.org

ABSTRACT

Background: Left ventricular noncompaction (LVNC) describes deep trabeculations in the left ventricular (LV) endocardium and a thinned epicardium. LVNC is seen both as a primary cardiomyopathy and as a secondary finding in other syndromes affecting the myocardium such as neuromuscular disorders. The objective of this study is to define the prevalence of LVNC in the Duchenne Muscular Dystrophy (DMD) population and characterize its relationship to global LV function.

Methods: Cardiac magnetic resonance (CMR) was used to assess ventricular morphology and function in 151 subjects: DMD with ejection fraction (EF) > 55% (n = 66), DMD with EF < 55% (n = 30), primary LVNC (n = 15) and normal controls (n = 40). The non-compacted to compacted (NC/C) ratio was measured in each of the 16 standard myocardial segments. LVNC was defined as a diastolic NC/C ratio > 2.3 for any segment.

Results: LVNC criteria were met by 27/96 DMD patients (prevalence of 28%): 11 had an EF > 55% (prevalence of 16.7%), and 16 had an EF < 55% (prevalence of 53.3%). The median maximum NC/C ratio was 1.8 for DMD with EF > 55%, 2.46 for DMD with EF < 55%, 1.54 for the normal subjects, and 3.69 for primary LVNC patients. Longitudinal data for 78 of the DMD boys demonstrated a mean rate of change in NC/C ratio per year of +0.36.

Conclusion: The high prevalence of LVNC in DMD is associated with decreased LV systolic function that develops over time and may represent muscular degeneration versus compensatory remodeling.

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Related in: MedlinePlus

Noncompacted to compacted ratio. This is a box plot showing the mean (diamond), median (middle vertical line), as well as interquartile range (end of the boxes) of the highest NC/C ratio for each population. DMD, Duchenne Muscular Dystrophy; EF, ejection fraction; LVNC, left ventricular noncompaction; NC, noncompacted length; C, compacted length.
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Figure 4: Noncompacted to compacted ratio. This is a box plot showing the mean (diamond), median (middle vertical line), as well as interquartile range (end of the boxes) of the highest NC/C ratio for each population. DMD, Duchenne Muscular Dystrophy; EF, ejection fraction; LVNC, left ventricular noncompaction; NC, noncompacted length; C, compacted length.

Mentions: The median NC/C ratios with interquartile ranges were calculated for each of the groups. The median maximal NC/C ratio was 1.8 (IQR 1.57, 2.02) for DMD boys with EF > 55% compared to 1.54 (IQR 1.29, 1.78) for the normal group (p < 0.0001). For DMD boys with EF < 55% median maximal NC/C ratio was 2.46 (IQR 1.84, 3.04) compared to 3.69 (IQR 2.81, 4.23) for the LVNC group (p < 0.0001) (Figure 4).


Left ventricular noncompaction in Duchenne muscular dystrophy.

Statile CJ, Taylor MD, Mazur W, Cripe LH, King E, Pratt J, Benson DW, Hor KN - J Cardiovasc Magn Reson (2013)

Noncompacted to compacted ratio. This is a box plot showing the mean (diamond), median (middle vertical line), as well as interquartile range (end of the boxes) of the highest NC/C ratio for each population. DMD, Duchenne Muscular Dystrophy; EF, ejection fraction; LVNC, left ventricular noncompaction; NC, noncompacted length; C, compacted length.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750745&req=5

Figure 4: Noncompacted to compacted ratio. This is a box plot showing the mean (diamond), median (middle vertical line), as well as interquartile range (end of the boxes) of the highest NC/C ratio for each population. DMD, Duchenne Muscular Dystrophy; EF, ejection fraction; LVNC, left ventricular noncompaction; NC, noncompacted length; C, compacted length.
Mentions: The median NC/C ratios with interquartile ranges were calculated for each of the groups. The median maximal NC/C ratio was 1.8 (IQR 1.57, 2.02) for DMD boys with EF > 55% compared to 1.54 (IQR 1.29, 1.78) for the normal group (p < 0.0001). For DMD boys with EF < 55% median maximal NC/C ratio was 2.46 (IQR 1.84, 3.04) compared to 3.69 (IQR 2.81, 4.23) for the LVNC group (p < 0.0001) (Figure 4).

Bottom Line: LVNC was defined as a diastolic NC/C ratio > 2.3 for any segment.Longitudinal data for 78 of the DMD boys demonstrated a mean rate of change in NC/C ratio per year of +0.36.The high prevalence of LVNC in DMD is associated with decreased LV systolic function that develops over time and may represent muscular degeneration versus compensatory remodeling.

View Article: PubMed Central - HTML - PubMed

Affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. Christopher.statile@cchmc.org

ABSTRACT

Background: Left ventricular noncompaction (LVNC) describes deep trabeculations in the left ventricular (LV) endocardium and a thinned epicardium. LVNC is seen both as a primary cardiomyopathy and as a secondary finding in other syndromes affecting the myocardium such as neuromuscular disorders. The objective of this study is to define the prevalence of LVNC in the Duchenne Muscular Dystrophy (DMD) population and characterize its relationship to global LV function.

Methods: Cardiac magnetic resonance (CMR) was used to assess ventricular morphology and function in 151 subjects: DMD with ejection fraction (EF) > 55% (n = 66), DMD with EF < 55% (n = 30), primary LVNC (n = 15) and normal controls (n = 40). The non-compacted to compacted (NC/C) ratio was measured in each of the 16 standard myocardial segments. LVNC was defined as a diastolic NC/C ratio > 2.3 for any segment.

Results: LVNC criteria were met by 27/96 DMD patients (prevalence of 28%): 11 had an EF > 55% (prevalence of 16.7%), and 16 had an EF < 55% (prevalence of 53.3%). The median maximum NC/C ratio was 1.8 for DMD with EF > 55%, 2.46 for DMD with EF < 55%, 1.54 for the normal subjects, and 3.69 for primary LVNC patients. Longitudinal data for 78 of the DMD boys demonstrated a mean rate of change in NC/C ratio per year of +0.36.

Conclusion: The high prevalence of LVNC in DMD is associated with decreased LV systolic function that develops over time and may represent muscular degeneration versus compensatory remodeling.

Show MeSH
Related in: MedlinePlus