[One-and-a-half correction. Results at the National Institute of Cardiology "Ignacio Chávez"]. / Corrección uno y medio. Resultados en el Instituto Nacional de Cardiología "Ignacio Chávez".

Herein we describe a preliminary report of 4 patients with hypoplastic right ventricle and 3 patients with Ebstein's anomaly who undergone "one and a half" repair at the Instituto Nacional de Cardiología "Ignacio Chávez". There was not surgical mortality and at mid-term follow up the patients are doing well.

[Bidirectional cavopulmonary diversion for tricuspid atresia. Experience in the National Institute of Cardiology]. / Derivación cavopulmonar bidireccional para la atresia tricuspídea. Experiencia en el Instituto Nacional de Cardiología.

Bidirectional cavopulmonary shunt is an alternative palliative procedure for patients with congenital cyanotic heart disease, specially those patients less than "ideal" candidates for a Fontan's procedure. We present our results with this shunt in patients with tricuspid atresia. Twenty patients with tricuspid atresia were operated on with this shunt, with these associated defects: 20 atrial septal defect, 17 ventricular septal defect, 10 pulmonary stenosis, 1 pulmonary atresia and 1 transposition of the great arteries. Sex: 10 males and 10 females; the age was 27 days to 6 years (mean 1.8 years), the weight was 3.2 kg to 24 kg (mean 10.7 kg), the mean pulmonary artery pressure was 11 to 24 mmHg (mean 17 mmHg), pulmonary vascular resistance was 1.5 to 5 UW (mean 3.1 UW). Postoperative oxygen saturation improved 15 to 120%. All patients survived the surgical procedure. Three patients died in the immediate postoperative period, 2 due to a complications in the postoperative period and 1 due to sepsis. There were two late deaths, 1 sudden death after 6 months of the shunt, and 1 due to sepsis after a Fontan's procedure. Four patients presented pleural effusion and 2 pericardial effusion, they resolved well. We have 15 patients alive and well, in functional class I, and minimal cyanosis. We can conclude that this surgical procedure is useful in the management of patients with tricuspid atresia.

Hernia diafragmatica subcostosternal.Presentacion de un caso. / Subcostosternal diaphragmatic hernia. Report of a case

Se presenta el caso de una nina de diez anos, con una hernia subcostosternal (hernia de Margagni), cuyos sintomas la hicieron consultar a una institucion hospitalaria especializada en cardiologia y cuyo tratamiento quirurgico fue exitoso.Se discuten aspectos diagnosticos, clinicos y quirurgicos de la entidad