Abstract
Fetal atrial flutter (AF) occurs in less than 1% of all pregnancies. It seems to have a poor prognosis, due in part to its association with structural heart disease and with development of hydrops fetalis. Early prenatal detection and treatment are essential to improve the outcome. We present a case of fetal AF coexistent with 2:1 atrioventricular block treated with intrauterine digoxin and quinidine. Under the impression of impending heart failure, a male infant who was small for gestational age was delivered by cesarean section. The infantile heart was restored to a sinus rhythm after a single electrocardioversion and a short period of digitalization. He did not need anti-arrhythmic medication. He has demonstrated normal development up to the time of writing (2 years old). The prenatal cardioechographic findings, modality of treatment, and outcome are discussed.
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