Fetal cardiac tissue doppler: Effect of the doppler angle on time intervals

Purpose: To examine the influence of doppler insonation angle on fetal cardiac time intervals. Material and methods: Pulsed Tissue Doppler measurements were performed in the right subvalvular ventricular myocardium and measured cardiac time intervals were used to calculate TD-Tei Index. We retrospectively examined 215 fetal cardiac tissue doppler measurements with regard to the doppler insonation angle using the intraventricular septum as reference. In 196 cases (91%) we were able to measure the angle of insonation. Results: In apical four chamber view we found a positive correlation between lateral deviation of…