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Right ventricular Tei index in children: effect of method, age, body surface area, and heart rate

David A Roberson1, Wei Cui

  • 1Heart Institute for Children, Hope Children's Hospital, Oak Lawn, Illinois 60453, USA. david@thic.com

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|June 5, 2007
PubMed

Insights

The right ventricular (RV) Tei index (RVTX) differs slightly between Doppler tissue imaging (DTI) and pulse wave Doppler (PWD) methods in children. RVTX is influenced by age and body surface area (BSA), requiring consideration for accurate RV function assessment.

Area of Science:

  • Pediatric Cardiology
  • Echocardiography
  • Cardiac Physiology

Background:

  • The right ventricular (RV) Tei index (RVTX) is a valuable tool for assessing global RV systolic and diastolic function.
  • Its application spans various pediatric congenital and acquired cardiac conditions.

Purpose of the Study:

  • To investigate the influence of Doppler tissue imaging (DTI) versus pulse wave Doppler (PWD) methods on RVTX measurements in children.
  • To determine the impact of age, body surface area (BSA), and heart rate on RVTX values.

Main Methods:

  • A cross-sectional study involving 308 children with normal echocardiograms.
  • RVTX was calculated using both DTI and PWD in each participant.
  • Univariate and multivariate regression analyses were performed to assess influencing factors.

Main Results:

  • A statistically significant difference was observed between RVTX-DTI (0.37 ± 0.05) and RVTX-PWD (0.34 ± 0.06).
  • Age and BSA showed small positive correlations with both RVTX methods, while heart rate exhibited a negative correlation.
  • Multivariate analysis revealed BSA as a significant factor for RVTX-DTI and age for RVTX-PWD.

Conclusions:

  • The method used for RVTX measurement (DTI vs. PWD) impacts results in pediatric populations.
  • Accurate RVTX assessment necessitates considering BSA for DTI measurements and age for PWD measurements.
  • These findings are crucial for reliable evaluation of RV function in children.

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