[Percutaneous closure of a ductus arteriosus with a Gianturco coil in an infant weighing 3.2 kg]. / Cierre percutáneo del conducto arterioso con espiral de Gianturco en lactante de 3.2 kg de peso.

We report a case of an infant, with Down's syndrome that weighted 3.2 K and had cardiorespiratory distress due to patent ductus arteriosus. Echocardiogram showed evidence of pulmonary hypertension. Cardiac catheterization was performed, the ductus was a A-2 type. It had 1.5 mm of diameter. Moderate pulmonary hypertension was found with a QP/QS = 1.8. A Gianturco coil was placed in the ductus via the femoral vein: the size of the coil was 5 mm/5 cm. There was not post-procedural evidence of patency of the ductus. We conclude that the closure of the ductus by percutaneous means in symptomatic patients is a good treatment alternative.

[Use of nitric oxide in the evaluation of pulmonary arterial hypertension]. / Uso del óxido nítrico en la valoración de la hipertensión arterial pulmonar.

The purpose of this article is to describe a patient with severe pulmonary artery hypertension, who was evaluated in the catheterization laboratory with the use of nitric oxide to check the degree of reversibility of the pulmonary hypertension. The patient is a 18 months old baby with atrio-ventricular canal and severe pulmonary hypertension, whose vascular resistance dropped from 8.75 Wood U/m2 to 1.32 Wood U/m2. With these findings the pulmonary artery hypertension was considered reversible and made him a good candidate for successful corrective surgery. The use of nitric oxide is very useful for the evaluation of the degree of reversibility of the pulmonary vascular resistance in cases with severe pulmonary artery hypertension with a left to right shunt.