Key result
Gestational age was strongly correlated with tricuspid annular peak systolic velocity (S'), which increased from a mean of 4.5 cm/s at 26 weeks to 7.8 cm/s at 40 weeks.
Why the study?
What are the reference values for tricuspid annular peak systolic velocity (S') measured by tissue Doppler imaging in preterm and term neonates?
Observational (n=290)
What are the reference values for tricuspid annular peak systolic velocity (S') measured by tissue Doppler imaging in preterm and term neonates?
This study establishes reference values and Z-scores for tricuspid annular peak systolic velocity (S') in preterm and term neonates, demonstrating a significant increase with gestational age.
Answers are grounded in this paper and cite their sources.
Provides gestational age-specific S' reference values for neonatal RV assessment; leaves open prospective validation for clinical decision-making.
BACKGROUND: The tricuspid annular peak systolic velocity (S') is an echocardiographic measurement to assess systolic right ventricular function in adults and children. OBJECTIVE: We determined growth and birth weight-related changes of S' to establish reference values in preterm and term neonates. METHODS: A prospective study was conducted in a group of 290 preterm and term neonates (gestational age 26 + 0 to 40 + 6 weeks of gestation; birth weight 660-4,460 g). A correlation of S' values with established tricuspid annular plane systolic excursion (TAPSE) values was performed. RESULTS: The S' ranged from a mean of 4.5 cm/s (Z-score ± 2 SD: 3.6-5.5 cm/s) in preterm neonates in week 26(0-6) of gestation to 7.8 cm/s (Z-score ± 2 SD: 5.5-10.1 cm/s) in term neonates in week 40(0-6) of gestation. The S' values increased from 26 to 40 weeks of gestation. S' and week of gestation are strongly correlated: Pearson's correlation coefficient was 0.66 for week of gestation - S' (p < 0.001). A significant correlation was found between S' and TAPSE values (r = 0.67; p < 0.001). CONCLUSION: Z-scores of S' values were calculated and percentile charts were established to serve as reference data for preterm and term neonates with structurally normal hearts.
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Köestenberger et al. (2013) conducted an observational in Preterm and term neonates (n=290). Gestational age was evaluated on Tricuspid annular peak systolic velocity (S') (r = 0.66, p=< 0.001). Gestational age was strongly correlated with tricuspid annular peak systolic velocity (S'), which increased from a mean of 4.5 cm/s at 26 weeks to 7.8 cm/s at 40 weeks.
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