Evolución posquirúrgica de la hipertensión arterial pulmonar asociada a conducto arterioso permeable a una altitud de 2680 metros sobre el nivel del mar / Postoperative evolution of pulmonary arterial hypertension associated with patent ductus arteriosus at an altitude of 2680 meters above sea level

Introducción: El conducto arterioso permeable puede provocar hipertensión arterial pulmonar; éste ocupa el primer lugar de las cardiopatías congénitas quirúrgicas en la ciudad de Toluca, México. Métodos: En el periodo comprendido entre enero del 2006 y diciembre del 2011 se operaron 51 pacientes con conducto arterioso permeable: 34 (66.7%) del sexo femenino. Se estudia la reversibilidad de la presión arterial pulmonar y de la dilatación de cavidades izquierdas posterior al cierre quirúrgico del conducto arterioso permeable y se describen las complicaciones posquirúrgicas en la población de la ciudad de Toluca, localizada a una altitud de 2680 metros sobre el nivel del mar (msnm). Resultados: La reversibilidad de la presión pulmonar ocurrió en el 88% de los casos. También se observó una disminución de los diámetros de las cavidades izquierdas, manifestado por una relación de aurícula izquierda/anillo aórtico prequirúrgica de 2.0±0.41 y posquirúrgica de 1.36±0.25 (p<0.001). El cierre exitoso del conducto arterioso permeable inmediato fue del 94.1% y mediato del 98.0%. Se presentaron complicaciones posquirúrgicas en el 13.8% de los pacientes, todas fueron menores, siendo las principales: infección y hematoma de la herida quirúrgica (5.9%), neumotórax (3.9%), neumonía (2.0%) y derrame pleural (2.0%). Conclusiones: La hipertensión arterial pulmonar secundaria a conducto arterioso permeable es reversible en la mayoría de los casos después del cierre quirúrgico, incluso en habitantes de localidades por arriba de los 2500 msnm.

Introduction: Patent ductus arteriosus in Toluca can cause pulmonary hypertension and ranks first surgery of congenital heart disease in Toluca, Mexico. Methods: In the period between January 2006 and December 51 patients with patent ductus arteriosus went to surgery: 34 (66.7%) were female. We study the reversibility of pulmonary arterial pressure and the left cavities dilatation after surgical closure of the ductus arteriosus and postoperative complications are described in a population of Toluca, located at an altitude of 2680 meters over the sea. Results: The reversibility of pulmonary pressure ocurred in 88% of cases. We also observed a decrease in the diameters of the left chambers manifested by a ratio of left atrium/aortic annulus before surgery of 2.0 ± 0.41 SD and after surgery of 1.36 ± 0.25 SD, (p<0.001). The successful closure of the ductus arteriosus was 94.1% immediately and mediate 98.0%. Postoperative complications ocurred in 13.8%, being the main infection and surgical wound hematoma (5.9%), pneumothorax (3.9%), pneumonia (2.0%) and pleural efusion (2.0%). Conclusions: Pulmonary arterial hypertension secundary to patent ductus arteriosus is reversible in the mayority of cases after surgical closure, including residents of village above 2500 meters over the sea.

Síndrome de la válvula pulmonar ausente. Evolución, tratamiento y factores asociados a muerte / Absent pulmonary valve syndrome. Evaluation, surgical treatment and risk factors

From 1991 to 2003 were studied 33 cases with absent pulmonary valve syndrome (AVPS): 66% were female, with a medium age of 1.5 years old and 11 kg of weight. Twenty seven cases (82%) were associated to Tetralogy of Fallot. Fourteen patients (5 younger than 1 year old) had corrective surgery. After the surgery, one patient required ballon pulmonary valvuloplasty for pulmonary stenosis; another one required surgery for changing the pulmonary prothesis one and five years after the first surgery. The rest of the patients did not present important problems. The five year survival was 95.4% in patients older than 6 months and 30.1% in younger patients (p = 0.000). As factors associated to mortality were the age younger than six months old (p = 0.003) and mechanical ventilation (p = 0.001) in our population. We suggest to delay the surgery in this group of patients because no survival were seen with or without the surgery. In older children with symptoms, the surgery also must be delayed in order to avoid more interventions for changing the pulmonary prothesis.