Abstract
Background: To define age-related changes in left and right ventricular function using myocardial performance index (Tei Index) in healthy term newborn infants.
Materials and Methods: 9 newborn infants were selected from normal full-term healthy neonates with gestational age 38-42 weeks, mean birth weight 3572 g (min. 2870, max. 4160 g). The Tei Index is a Doppler myocardial performance tool which can be used to evaluate of systolic and diastolic function. The first measurement was taken as soon as possible after birth, the second one was taken on day 3 of life.
Results: The higher Tei index were obtained in the right ventricle (mean value - 0,44; SD +/-;0,11) then the left ventricle (mean value - 0,31; SD +/-;0,07) in the first day of life. In the left ventricle the Tei index were converted during the first three days of life (from mean value 0,31 to 0,37), and we observed the convertion in the right ventricle too between the first and the third day of life (mean value 0,44- day 1 to 0,26 -day 3).
Conclusion: In neonates, the diastolic and systolic fuction of the right ventricle were higher then those measured in the left ventricle during the first day of life and this ratio changing in the third day of life. Higher mean value Tei index in the right ventricle might be reflecting the “persistent” fetal status of this ventricle in the first day of life. Further investigations are needed in a greater population of neonates. (granted MZiNSW nr NN407414336).
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Bokiniec, R., Wlasienko, P., Szymkiewicz-Dangel, J. et al. 612 Myocardial Performance Index (TEI Index) in Term Neonates-Preliminary Study. Pediatr Res 68 (Suppl 1), 313–314 (2010). https://doi.org/10.1203/00006450-201011001-00612
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DOI: https://doi.org/10.1203/00006450-201011001-00612