Journal of Cardiovascular Imaging

Korean Society of Echocardiography (한국심초음파학회)
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Right Atrial Strain in Preterm Infants With a History of Bronchopulmonary Dysplasia

  • Soo Jung Kang (Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine) ;
  • Hyemi Jung (Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine) ;
  • Seo Jung Hwang (Department of Diagnostic Laboratory Medicine, CHA Bundang Medical Center, CHA University School of Medicine) ;
  • Hyo Jin Kim (Department of Diagnostic Laboratory Medicine, CHA Bundang Medical Center, CHA University School of Medicine)
  • Received : 2021.07.24
  • Accepted : 2021.11.03
  • Published : 2022.04.27
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Abstract

BACKGROUND: Few studies have utilized right atrial (RA) strain to evaluate right ventricular (RV) diastolic dysfunction in preterm infants with bronchopulmonary dysplasia (BPD). We aimed to evaluate the associations of RA strain with BPD severity and respiratory outcomes in preterm infants with BPD. METHODS: We retrospectively studied 153 infants with BPD born before 32 weeks of gestational age at CHA Bundang Medical Center. Peak longitudinal right atrial strain (PLRAS) was obtained using velocity vector imaging and compared among infants across BPD severity. Conventional echocardiographic parameters and clinical characteristics were also evaluated. RESULTS: In infants with severe BPD, mean gestational age (27.4 ± 2.1 weeks) and mean birth weight (971.3 ± 305.8 g) were significantly smaller than in those with mild BPD (30.0 ± 0.9 weeks, 1,237.3 ± 132.2 g) and moderate BPD (29.6 ± 1.3 weeks, 1,203.2 ± 214.4 g). PLRAS was significantly lower in infants with severe BPD (26.3 ± 10.1%) than in those in the moderate BPD group (32.4 ± 10.9%) or mild BPD group (31.9 ± 8.3%). Tricuspid E/e' and maximum RA volume index were similar across BPD severity. A decrease in PLRAS was significantly correlated with increased duration of mechanical ventilation duration; however, tricuspid E/e' and maximum RA volume index were not. CONCLUSIONS: Evaluating PLRAS with other parameters in infants with BPD might detect RV diastolic dysfunction. Longer follow-up and larger study populations may elucidate the association between PLRAS and respiratory outcomes in infants with BPD.

Keywords

Acknowledgement

This study was supported by a grant from the Korean Society of Echocardiography.

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