Spontaneous Closure of Right Pulmonary Artery-to-left Atrium Fistula: a Case Report.

Direct communication between the right pulmonary artery and the left atrium is rare. We report a case that was first detected in utero and confirmed by a two-dimensional echocardiographic study performed postnatally. The patient remained asymptomatic, and hence was managed conservatively. The fistula gradually decreased in size and closed spontaneously at 15 months of age. The rarity of the case is discussed.