Reference values for left and right ventricular trabeculation and non-compacted myocardium

Int J Cardiol. 2015 Apr 15;185:240-7. doi: 10.1016/j.ijcard.2015.03.065. Epub 2015 Mar 4.

Abstract

Background: Since the differentiation between physiological and pathological trabeculation is challenging, we assessed its distribution in a reference population of selected healthy volunteers.

Methods: We studied 117 subjects (58 males) stratified into age tertiles and by gender. Cardiovascular magnetic resonance images were acquired using a standard SSFP-sequence. Left and right ventricular (LV/RV) end-diastolic (EDV), end-systolic (ESV) and trabeculated volumes indexed to the body surface area as well as ejection fraction (EF) were quantified in short-axis views. The maximum non-compacted-to-compacted (NC/C) ratio was measured in long-axis views.

Results: The trabeculated volumes were significantly larger in men than in women and decreased with age. The correlation between both was moderate (r=0.46; p<0.001). LV trabeculated volume was positively associated with EDV and ESV (r=0.74; r=0.59; both p<0.001) and negatively with EF (r=-0.27; p<0.005). It was no independent predictor for EF. The maximum NC/C ratio was >2.3 in 46.2% and >2.5 in 37.6% of the subjects, which is regarded as abnormal in current literature. The fraction of subjects with a maximum NC/C ratio >2.3 and the mean maximum NC/C ratio differed significantly between gender but not between age groups. An increasing NC/C ratio was associated with a significant decrease in EF (r=-0.21; p<0.05).

Conclusion: A considerable amount of healthy volunteers fulfils the current diagnostic criteria of LV noncompaction with female subjects showing a higher fraction of false-positive results than males. LV trabeculated volume is more pronounced in young subjects and declines with age. The use of age- and gender-specific reference values as provided in this study may facilitate the delineation of physiological and pathological findings.

Keywords: Age; Cardiovascular magnetic resonance; Gender; Physiology; Reference values; Trabeculation.

MeSH terms

  • Adult
  • Body Surface Area
  • Female
  • Heart Ventricles / pathology
  • Heart Ventricles / physiopathology*
  • Humans
  • Isolated Noncompaction of the Ventricular Myocardium / diagnosis*
  • Isolated Noncompaction of the Ventricular Myocardium / physiopathology
  • Magnetic Resonance Imaging, Cine / methods*
  • Male
  • Middle Aged
  • Myocardium / pathology*
  • Reference Values
  • Stroke Volume / physiology
  • Ventricular Function, Left / physiology*
  • Ventricular Function, Right / physiology*
  • Young Adult