AI Article Synopsis

  • The study aimed to establish reference data for atrial size and function in children and adolescents using cardiac MRI.
  • A total of 115 healthy participants (ages 4.4 to 20.3) were examined to measure atrial volumes and their functional metrics, resulting in sex-specific findings, particularly in size variances between genders.
  • The results indicated that boys generally exhibited larger atrial volumes and cyclic volume change, while girls demonstrated better emptying fractions, suggesting the need for tailored pediatric reference standards for clinical assessment and research.

Article Abstract

Purpose: To provide reference data for atrial size and function during childhood and adolescence by cardiac MR (CMR).

Materials And Methods: We prospectively examined 115 healthy children and adolescents (mean age, 12.4 ± 4.1 years; range, 4.4-20.3 years) by CMR using a stack of standard two-dimensional steady-state free-precession slices acquisition covering the whole heart in transverse plane. Maximal and minimal volumes of both atria and their respective calculated cyclic volume change (CVC) and emptying fraction (EMF) were determined and reference centile curves were computed (lambda-mu-sigma [LMS]-method).

Results: Gender differences were noted for atrial volumes and derived parameters. Maximal right atrial (RA) volume for girls was 53.3 ± 11.8 mL/m(2) and 58.1 ± 15.7 for boys (P = 0.064), minimal RA volume for girls/boys was 23.2 ± 6.2/27.0 ± 7.9 mL/m(2) (P = 0.004). Maximal left atrial (LA) volume for girls/boys was 44.2 ± 8.7/46.7 ± 10.1 mL/m(2) (P = 0.143) and minimal LA volume for girls/boys was 19.2 ± 3.9/21.5 ± 5.1 mL/m(2) (P = 0.009). For both atria, CVC was higher for boys, but EMF higher for girls. Percentiles of RA/LA volumes showed steeper increase in boys than in girls, who in fact showed a plateau after age 14.

Conclusion: Pediatric sex-specific reference centiles are provided to improve clinical interpretation and facilitate future research involving CMR-derived atrial function.

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http://dx.doi.org/10.1002/jmri.22521DOI Listing

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Article Synopsis
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  • A total of 115 healthy participants (ages 4.4 to 20.3) were examined to measure atrial volumes and their functional metrics, resulting in sex-specific findings, particularly in size variances between genders.
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