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OP04.06: Qualitative evaluation of radial and longitudinal isovolumic time intervals in fetuses by tissue doppler imaging (TDI) echocardiography

Results: The mean gestational age was 25.5 weeks (17–38 weeks). Standard and modified tei index was easily obtained in all patients. Standard Tei index was 0.45 (SD, 0.07), and modified Tei index was 0,42 (SD, 0.08). No significant correlation was found between Tei index with gestational age (COV 0.09). There was not significant difference, Tei index value, between both methods (t student 99%: 2,61 > t calculated: −0.30). There was no difference in Inter observer agreement in standard (t student 99%: 2,61 > t calculated: −0.27) and modified Tei Index (t student 99%: 2,61 > t calculated: 0.14), however difference was lower using clicks signals. Conclusion: Standard and modified Tei index are feasible and easily obtained. Both methods can be use to evaluate myocardial performance. Modified Tei index is probably more reproducible and easy to measure, however is not a significant trend. More studies should be performed to test this method as a clinical tool.