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To analyze the ventricular function in fetus with Ebstein’s anomaly by velocity vector imaging, and to explore the correlation between the cardiac function and the blood flow across the pulmonary valve.
We choose 26 EA fetus and 39 normal fetus with matching gestation weeks; then divide EA fetus into 2 groups according to the pulmonary valve flow direction, direct or reverse. We obtain the left and right ventricular myocardial long axis integral peak velocity, strain and strain rate by VVI, then compare in the group and between groups.
1.Between groups: The right ventricular global longitudinal strain (GLS) and diastolic velocity in EA group is -13.16±5.31% and -1.86±0.55 cm/s, meanwhile in the normal group is -18.89±0.80% and -2.25±0.73 cm/s. The data in EA group are lower than the normal group, with significant difference(p < 0.01).
2. Within group: The left ventricular GLS in EA fetus with pulmonary valve reverse flow is -22.60±5.13%, and in EA fetus with direct flow is -18.58±4.25%. The data in fetus with reverse flow are higher than the fetus with direct flow, with significant difference(p < 0.05).
The Ebstein’s anomaly affect the fetal cardiac function significantly, with difference influence in varying degrees deformity. VVI can sensitively reflect the myocardial mechanics changes in EA fetus, especially the GLS and diastolic velocity with great sensitivity and specificity for myocardial function evaluation.