FETAL AND NEONATAL HYPERTENSION IN TWIN-TWIN TRANSFUSION SYNDROME - ACASE-REPORT

We report a case of fetal systemic hypertension. This occurred in an e x-donor twin soon after coagulation of chorionic vessels and amniodrai nage performed for severe twin-twin transfusion syndrome during the 2n d trimester of pregnancy. Systemic hypertension was suspected because of a high systolic velocity through the tricuspid valve, and Bernoulli 's equation was used to estimate the right intraventricular pressure. As both pulmonary arteries and ductus arteriosus were normal, the pres sure in the aorta was considered to be equal to that in the right vent ricle (60 mm Hg). Fetal systemic hypertension could have happened eith er because of a dramatic increase in placental resistances in the terr itory of the ex-donor twin or by reversal of the fetofetal transfusion pathological process.