Spontaneous constriction of fetal ductus arteriousus

The case report describes the pre-and postnatal clinical and sonographic fi ndings of a fetus with spontaneous constriction of Ductus arteriosus at 39 weeks gestation. An abnormal four-chamber view due to a hypertrophied and enlarged right ven tricle, increased peak systolic (2,39 m/sec), increased peak diastolic (0,8 8 m/sec) velocities and the decreased pulsatility index of 0,92 were the di agnostic criteria. The now of the right pulmonary artery was retrograd. Aft er birth estimated pulmonary pressure was 50 mmHg. It is concluded that constriction of the fetal ductus arteriosus may also o ccur spontaneously in the absence of maternal drugs.