Abstract
Vasa previa is a condition in which the cord inserts into the membranes through which vessels then run, unprotected, until they insert into the placenta. These vessels run between the fetal presenting part above and the cervix below. When the membranes rupture, these vessels almost invariably rupture also, with resulting severe fetal hemorrhage and a high likelihood of fetal death from exsanguination. 1 - 4 The key to a good outcome lies in prenatal sonographic diagnosis of the condition and cesarean delivery before the membranes rupture.1-6 We describe the diagnosis and evaluation of vasa previa with 3-dimensional (3D) sonography and power angiography and discuss how these techniques were helpful in achieving a good outcome.
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