20 years of experience with the Fontan procedure: characteristics and clinical outcomes of children in a tertiary referral hospital.

INTRODUCTION: Without participating in a contractile chamber, the Fontan procedure seeks to create a separation of oxygenated and deoxygenated blood in patients with univentricular heart, reducing the risks of long-term hypoxemia and improving their survival. This study describes the clinical outcomes of children undergoing the Fontan procedure between 2000 and 2020 in a tertiary referral hospital care centre in southwestern Colombia. MATERIALS AND METHODS: A retrospective observational descriptive study. The 81 patients who underwent the Fontan procedure were included. Categorical variables were presented with percentages and continuous variables with measures of central tendency according to the distribution of the data evaluated through the Shapiro-Wilk test. Sociodemographic, clinical, surgical variables, complications, and mortality were described. RESULTS: Between 2000 and 2020, 81 patients underwent the Fontan procedure: 43 (53.1%) males and a median age of 5.3 years (interquartile range 4.3-6.6). The most common diagnosis was tricuspid atresia (49.4%). The median mean pulmonary arterial pressure was 12 mmHg (interquartile range 10-15), the Nakata index 272 mm2/m2 (interquartile range 204-327), and the McGoon index (interquartile range 1.86-2.3). Seventy-two (88.9%) patients underwent extracardiac Fontan and 44 (54.3%) patients underwent fenestration. The median hospitalisation days were 19 days. The main complication was coagulopathy (19.8%), mortality in the first month between 2000 and 2010 was 8.6%, and after 2010 was 1.2%. CONCLUSION: The Fontan procedure is a palliative surgery for children with complex heart disease. According to anatomical and physiological variables, the proper choice of patients determines the short- and long-term results.

Acute Liver Failure due to Altered Fontan Circulation in a Patient With Tricuspid Atresia: A Case Report.

Tricuspid atresia is a congenital malformation of the tricuspid valve resulting in a lack of blood flow between the right atrium and the right ventricle. Management generally involves staged surgical intervention enabling affected individuals to survive into adulthood. Although surgical intervention greatly improves morbidity and mortality in this patient population, there are many long-term complications associated with the creation of a surgical shunt. We report a case of a 33-year-old male with tricuspid atresia who underwent Fontan surgery as a child and presented to our hospital with acute liver failure.

Superior vena cava obstruction after the Glenn procedure

Acute obstruction of superior vena cava anastomosis right after the Glenn procedure may lead to tragic consequences. We describe the case of a one-year-old child with tricuspid atresia and a previous Blalock-Taussig shunt procedure, who presented severe low cardiac output syndrome right after the Glenn procedure and died forty-four hours after the procedure. The autopsy showed obstruction of the superior vena cava anastomosis. Patients that present superior vena cava syndrome and low cardiac output right after the Glenn procedure should have the surgical anastomosis revised immediately.

Mapeo y ablación por radiofrecuencia a cielo abierto: un caso de taquicardia ventricular refractaria en anomalía de Ebstein / Open-heart mapping and radiofrequency ablation: a case of refractory ventricular tachycardia in Ebstein's anomaly

Resumen La anomalía de Ebstein es una enfermedad congénita, caracterizada por el desplazamiento y la adherencia de la válvula tricúspide. Las valvas septal y posterior se implantan en posiciones más inferiores, causando insuficiencia tricuspídea, esta condición de forma progresiva genera dilatación y deterioro de la función sistólica ventricular derecha. Comúnmente se asocia a otras entidades, principalmente, a la comunicación interauricular y las arritmias mediadas por vías accesorias. La muerte súbita ocurre en estadios avanzados, usualmente relacionados con episodios de taquicardia ventricular. Este reporte describe un caso de anomalía de Ebstein y tormenta arrítmica, que se sometió a ablación del sustrato arrítmico endo y epicárdico en la porción atrializada del ventrículo derecho, que presentó como complicación intraprocedimiento la perforación del ventrículo, el taponamiento cardiaco y la necesidad urgente de la reparación quirúrgica, realizándose en el intraoperatorio una segunda ablación por radiofrecuencia a cielo abierto con el objetivo de eliminar los potenciales tardíos y los fragmentados remanentes en el área de bajo voltaje de la escara. Veintidós semanas después de la ablación se implantó un cardiodesfibrilador subcutáneo para prevención secundaria de la muerte súbita; en el seguimiento a 14 meses no hubo terapias apropiadas del dispositivo.

Abstract Ebstein's anomaly is a congenital disease characterised by the displacement and adherence of the tricuspid valve. Septal and posterior valves are implanted in lower positions, thus causing tricuspid insufficiency. This condition gradually generates dilation and deterioration of the right ventricular systolic function. It is commonly associated to other conditions, mainly atrial septal defect and accessory pathway arrhythmias. Sudden death occurs in the advanced stages, usually related to episodes of ventricular tachycardia. This report describes a case of Ebstein's anomaly and arrhythmic storm who underwent ablation of the arrhythmic endo- and epicardial substract in the atrialized portion of the right ventricle, that developed as an intrasurgical complication the perforation of the ventricle, cardiac tamponade and urgent need of surgical repair. During the surgery a second open-heart radiofrequency ablation was conducted with the goal of eliminating potentially late and fragmented remnants in the low voltage area of the scars. Twenty two weeks after the ablation a subcutaneous cardioverterdefibrillator was implanted for secondary prevention of sudden death; in the follow-up after 14 months there were no appropriate therapies of the device.

Diagnóstico prenatal de atresia tricuspidea / Prenatal diagnosis of tricuspid atresia

La atresia tricuspidea es una cardiopatía rara caracterizada por oclusión de la válvula tricúspide y asociada a hipoplasia de ventrículo derecho y estenosis pulmonar. Clásicamente se presenta con un defecto en septun ventricular. El diagnóstico puede establecerse con ecocardiografía fetal y usualmente se sospecha ante una imagen de cuatro cámaras anormal.

Terapia de ressincronização cardíaca em portador de coração univentricular para correção de dissincroniomiopatia causada por mudança do sítio de estimulação / Cardiac resynchronization therapy in severe systolic dysfunction in a univentricular heart patient to correct dyssynchrony cardiomyopathy caused by change of stimulation site

Paciente com 6 anos de idade, do sexo masculino, portador de coração univentricular decorrente deatresia tricúspide com hipoplasia de ventrículo direito tipo IIC e submetido a implante de marcapasso por bloqueio atrioventricular total no pós-operatório de cirurgia de Fontan, em 2012. Houve necessidade de troca do sistema de estimulação em decorrência de infecção de loja logo após a troca do marcapasso, em 2014. Seis meses após amudança do sítio de estimulação, começou a apresentar quadro de insuficiência cardíaca refratária e disfunção sistólica grave, e o transplante cardíaco foi indicado. O paciente foi submetido a terapia de ressincronização cardíaca orientada por eletrocardiografia triaxial como ponte para transplante e apresentou melhora clínico-estrutural após10 semanas, recebendo alta hospitalar...

We report the case of a 6-year-old male patient with univentricular heart due to tricuspid atresia with right ventricular hypoplasia (IIc), who had a pacemaker implanted for complete heart block after a Fontan surgery in 2012. The stimulation system had to be exchanged due to a pocket infection soon after the pacemaker was exchanged in 2014. Six months after the stimulation site was exchanged he presented refractory heart failure and severe systolic dysfunction and a heart transplantation was indicated. He was submitted to cardiac resynchronization therapy guided by triaxial electrocardiography as a bridge for transplantation. The patient presented clinical and structural improvement after 10 weeks and was discharged...

Cirugía de Fontan: complicaciones posquirúrgicas: Medellín, Colombia / Fontan surgery: complications postsurgical: Medellin, Colombia

El manejo del corazón univentricular ha mejorado laexpectativa de vida de los pacientes con la cirugía deFontan.Objetivo: identificar las complicacionesposquirúrgicas más frecuentes de la cirugía de Fontanen pacientes de una institución privada de la ciudadde Medellín.Metodología: estudio descriptivo del tipo de seriesclínicas. La población estuvo compuesta porpacientes sometidos a la cirugía de Fontan. Lainformación sobre las variables sociodemográficas yclínicas fue tomada directamente de las historiasclínicas. La investigación contó con la aprobación delComité de ética. Se empleó el programa SPSS®versión 17.0 (SPSS Inc; Chicago, Illinois, EE.UU.) parael procesamiento y análisis de la información. Para elmanejo estadístico de los datos se empleó laestadística descriptiva.Resultados: participaron 21 pacientes, la mediana deedad fue de 5 años (mínimo 3 y máximo 10); el 66,7%fueron de sexo masculino. El 100% de los niños tenían antecedentes de cirugía paliativa previa, la másfrecuente fue el Glenn bidireccional. En cuanto a lascomplicaciones más frecuentes fueron derramepleural (52,4%), disfunción miocárdica e infección enherida (19%).Conclusiones: las complicaciones que sepresentaron coinciden con lo reportado en la literatura, cabe resaltar que ningún paciente refirió estenosissubaórtica ni hemorragias.

Univentricular heart management has improved thelife expectancy of patients with Fontan surgery.Objective: identify the most common postoperative complications of the Fontan surgery in patientsfrom a private institution from Medellin.Methodology: descriptive clinical series. Thepopulation was patients undergoing the Fontansurgery. Information about sociodemographic andclinical variables was taken directly from themedical records. The research was approved bythe Ethics Committee. We used SPSS ® version17.0 (SPSS Inc, Chicago, Illinois, USA) forprocessing and analysis of information. For statistical handling of data is used for descriptiv estatistics. Results: 21 patients participated, the median agewas 5 years (minimum 3, maximum 10), 66.7% were male. 100% of the children had a history of priorpalliative surgery, the most common was the bidirectional Glenn. As for the most common complications were pleural effusion (52.4%), myocardial dysfunction and wound infection (19%). Conclusions: the complications presented agree with those reported in the literature, it is notable that no patient reported sub aortic stenosis and bleeding.

Cirugía de Fontan: complicaciones posquirúrgicas. Medellín, Colombia / Fontan surgery: complications postsurgical. Medellin, Colombia

El manejo del corazón univentricular ha mejorado laexpectativa de vida de los pacientes con la cirugía deFontan.Objetivo: identificar las complicacionesposquirúrgicas más frecuentes de la cirugía de Fontanen pacientes de una institución privada de la ciudadde Medellín.Metodología: estudio descriptivo del tipo de seriesclínicas. La población estuvo compuesta porpacientes sometidos a la cirugía de Fontan. Lainformación sobre las variables sociodemográficas yclínicas fue tomada directamente de las historiasclínicas. La investigación contó con la aprobación delComité de ética. Se empleó el programa SPSS®versión 17.0 (SPSS Inc; Chicago, Illinois, EE.UU.) parael procesamiento y análisis de la información. Para elmanejo estadístico de los datos se empleó laestadística descriptiva.Resultados: participaron 21 pacientes, la mediana deedad fue de 5 años (mínimo 3 y máximo 10); el 66,7%fueron de sexo masculino. El 100% de los niños tenían antecedentes de cirugía paliativa previa, la másfrecuente fue el Glenn bidireccional. En cuanto a lascomplicaciones más frecuentes fueron derramepleural (52,4%), disfunción miocárdica e infección enherida (19%).Conclusiones: las complicaciones que sepresentaron coinciden con lo reportado en la literatura, cabe resaltar que ningún paciente refirió estenosissubaórtica ni hemorragias

Morbilidad y mortalidad posoperatoria en niños con corazón univentricular según diagnóstico morfológico / Postoperative mortality and morbidity found in children with univentricular heart according to the morphological diagnosis

Introducción: la atresia tricuspídea es la cardiopatía congénita cianótica que motiva mayor indicación de cirugía univentricular. El tratamiento quirúrgico consiste en separar las circulaciones sistémica y pulmonar a través de una derivación cavopulmonar total (proceder de Fontan). Objetivo: comparar la evolución posoperatoria del proceder de Fontan entre enero de 1990 y diciembre de 2010 en relación con el diagnóstico morfológico. Métodos: se ordenaron en 2 grupos de estudio (AT: atresia tricuspídea y No AT: con diagnóstico diferente a atresia tricuspídea). Las variables cualitativas y cuantitativas se analizaron a través de las pruebas chi cuadrado y t de student para un nivel de significación £ 0,05. Resultados: presentaron atresia tricuspídea 31 pacientes y 61 no atresia tricuspídea. En el posoperatorio 68 pacientes presentaron complicaciones, 23 con atresia tricúspidea (74,2 por ciento) y 45 con diagnóstico diferente a atresia tricuspídea (73,7 por ciento). Treinta pacientes presentaron efusiones pleurales persistentes durante el posoperatorio, 11 (35,5 por ciento) y 19 (31,4 por ciento) para la atresia tricúspidea y con diagnóstico diferente a atresia tricuspídea respectivamente. Fallecieron 18 enfermos, sin diferencia significativa entre ambos grupos. Durante el seguimiento, la causa de morbilidad más frecuentes fue por capacidad funcional disminuida de forma moderada o grave, en 13 pacientes con atresia tricúspidea (44,8 `por ciento) y en 20 (44,4 por ciento) en el otro grupo (p= 1). Conclusiones: el proceder de Fontan es una opción quirúrgica que permite la supervivencia de los pacientes con corazón univentricular asociada a morbilidad posoperatoria a largo plazo. El diagnóstico morfológico de atresia tricuspídea no se relaciona con la morbilidad y mortalidad(AU)

Introduction: tricuspid atresia is the cyanotic congenital heart disease that more frequently involves the indication of univentricular heart surgery. The surgical treatment consists of separating the systemic circulation from the pulmonary one through total cavopulmonary shunt (Fontan procedure). Objective: to compare the evolution of Fontan procedure postoperatively from January 1990 to December 2010 with the morphological diagnosis. Methods: the children were divided into 2 study groups (Triscupid atresia and Triscupid atresia-free with diagnosis different from that of tricuspid atresia). Chi square and Student's tests helped to analyze qualitative and quantitative variables for significance level £ 0.05. Results: tricuspid atresia was observed in 31 patients and 61 tricuspid atresia-free. In the postoperative period, 68 patients suffered complications, 23 with tricuspid atresia (74.2 percent) and 45 diagnosed with a disease other than tricuspid atresia (73.7 percent). Thirty patients had persistent pleural effusions during the postoperative period, 11 (35.5 percent) and 19 (31.4) in the tricuspid atresia group and in the tricuspid atresia-free group respectively. Eighteen patients died and no significant association was found in neither of the groups. During the follow-up, the most frequent cause of morbidity was reduced functional capacity either moderate or severe in 13 patients with tricuspid atresia (44.8 percent) and in 20 children (44.4 percent)from the other group (p= 1). Conclusions: Fontan procedure is a surgical option that allows the survival of patients with univentricular heart associated to long-term postoperative morbidity. The morphological diagnosis of tricuspid atresia is not related to morbility and mortality(AU)

Morbilidad y mortalidad posoperatoria en niños con corazón univentricular según diagnóstico morfológico / Postoperative mortality and morbidity found in children with univentricular heart according to the morphological diagnosis

Introducción: la atresia tricuspídea es la cardiopatía congénita cianótica que motiva mayor indicación de cirugía univentricular. El tratamiento quirúrgico consiste en separar las circulaciones sistémica y pulmonar a través de una derivación cavopulmonar total (proceder de Fontan). Objetivo: comparar la evolución posoperatoria del proceder de Fontan entre enero de 1990 y diciembre de 2010 en relación con el diagnóstico morfológico. Métodos: se ordenaron en 2 grupos de estudio (AT: atresia tricuspídea y No AT: con diagnóstico diferente a atresia tricuspídea). Las variables cualitativas y cuantitativas se analizaron a través de las pruebas chi cuadrado y t de student para un nivel de significación £ 0,05. Resultados: presentaron atresia tricuspídea 31 pacientes y 61 no atresia tricuspídea. En el posoperatorio 68 pacientes presentaron complicaciones, 23 con atresia tricúspidea (74,2 por ciento) y 45 con diagnóstico diferente a atresia tricuspídea (73,7 por ciento). Treinta pacientes presentaron efusiones pleurales persistentes durante el posoperatorio, 11 (35,5 por ciento) y 19 (31,4 por ciento) para la atresia tricúspidea y con diagnóstico diferente a atresia tricuspídea respectivamente. Fallecieron 18 enfermos, sin diferencia significativa entre ambos grupos. Durante el seguimiento, la causa de morbilidad más frecuentes fue por capacidad funcional disminuida de forma moderada o grave, en 13 pacientes con atresia tricúspidea (44,8 `por ciento) y en 20 (44,4 por ciento) en el otro grupo (p= 1). Conclusiones: el proceder de Fontan es una opción quirúrgica que permite la supervivencia de los pacientes con corazón univentricular asociada a morbilidad posoperatoria a largo plazo. El diagnóstico morfológico de atresia tricuspídea no se relaciona con la morbilidad y mortalidad

Introduction: tricuspid atresia is the cyanotic congenital heart disease that more frequently involves the indication of univentricular heart surgery. The surgical treatment consists of separating the systemic circulation from the pulmonary one through total cavopulmonary shunt (Fontan procedure). Objective: to compare the evolution of Fontan procedure postoperatively from January 1990 to December 2010 with the morphological diagnosis. Methods: the children were divided into 2 study groups (Triscupid atresia and Triscupid atresia-free with diagnosis different from that of tricuspid atresia). Chi square and Student's tests helped to analyze qualitative and quantitative variables for significance level £ 0.05. Results: tricuspid atresia was observed in 31 patients and 61 tricuspid atresia-free. In the postoperative period, 68 patients suffered complications, 23 with tricuspid atresia (74.2 percent) and 45 diagnosed with a disease other than tricuspid atresia (73.7 percent). Thirty patients had persistent pleural effusions during the postoperative period, 11 (35.5 percent) and 19 (31.4) in the tricuspid atresia group and in the tricuspid atresia-free group respectively. Eighteen patients died and no significant association was found in neither of the groups. During the follow-up, the most frequent cause of morbidity was reduced functional capacity either moderate or severe in 13 patients with tricuspid atresia (44.8 percent) and in 20 children (44.4 percent)from the other group (p= 1). Conclusions: Fontan procedure is a surgical option that allows the survival of patients with univentricular heart associated to long-term postoperative morbidity. The morphological diagnosis of tricuspid atresia is not related to morbility and mortality

[Atrioventricular canal defect, single atrium and tricuspid atresia as part of a case of Ellis-Van Creveld syndrome]. / Defecto del canal auriculoventricular, aurícula única y atresia tricuspídea como parte de un caso de síndrome de Ellis-Van Creveld.

Ellis-Van Creveld Syndrome or chondrectodermal dysplasia is produced by an autosomal recessive inheritance secondary to mutation in the short arm of chromosome 4. The syndrome affects multiple organs. It is described as a clinical tetrad that involves chondrodysplasia, ectodermal dysplasia, polydactyly and congenital heart defects. It is only known from reports and case series. We present a three months old male, without relevant family history, who presented chondrodysplasia, upper lip merged to palate, bilateral sinpolydactyly in the hands, developmental dysplasia of the hip, narrow chest with short ribs, and heart defects. This case is the first report of EVC in Peruvian literature.

Defecto del canal auriculoventricular, aurícula única y atresia tricuspídea como parte de un caso de síndrome de Ellis-Van Creveld / Atrioventricular canal defect, single atrium and tricuspid atresia as part of a case of Ellis-Van Creveld syndrome

El síndrome de Ellis-Van Creveld (SEVC) o displasia condroectodérmica se debe a una mutación de transmisión autosómica recesiva en el brazo corto del cromosoma 4 y afecta múltiples órganos. Descrito como una tétrada clásica de condrodisplasia, displasia ectodérmica, polidactilia y defectos cardíacos congénitos, sólo se conoce a partir de informes y series de casos. Se describe el caso de un varón de 3 meses, sin antecedentes familiares de importancia, que presentó un cuadro de condrodisplasia, labio superior fusionado al paladar, simpolidactilia posaxial bilateral en las manos, displasia del desarrollo de las caderas, tórax estrecho con costillas cortas y compromiso cardíaco. El presente caso sería la primera comunicación del SEVC en el Perú.

Ellis-Van Creveld Syndrome or chondrectodermal dysplasia is produced by an autosomal recessive inheritance secondary to mutation in the short arm of chromosome 4. The syndrome affects multiple organs. It is described as a clinical tetrad that involves chondrodysplasia, ectodermal dysplasia, polydactyly and congenital heart defects. It is only known from reports and case series. We present a three months old male, without relevant family history, who presented chondrodysplasia, upper lip merged to palate, bilateral sinpolydactyly in the hands, developmental dysplasia of the hip, narrow chest with short ribs, and heart defects. This case is the first report of EVC in Peruvian literature.

Defecto del canal auriculoventricular, aurícula única y atresia tricuspídea como parte de un caso de síndrome de Ellis-Van Creveld / Atrioventricular canal defect, single atrium and tricuspid atresia as part of a case of Ellis-Van Creveld syndrome

El síndrome de Ellis-Van Creveld (SEVC) o displasia condroectodérmica se debe a una mutación de transmisión autosómica recesiva en el brazo corto del cromosoma 4 y afecta múltiples órganos. Descrito como una tétrada clásica de condrodisplasia, displasia ectodérmica, polidactilia y defectos cardíacos congénitos, sólo se conoce a partir de informes y series de casos. Se describe el caso de un varón de 3 meses, sin antecedentes familiares de importancia, que presentó un cuadro de condrodisplasia, labio superior fusionado al paladar, simpolidactilia posaxial bilateral en las manos, displasia del desarrollo de las caderas, tórax estrecho con costillas cortas y compromiso cardíaco. El presente caso sería la primera comunicación del SEVC en el Perú.(AU)

Ellis-Van Creveld Syndrome or chondrectodermal dysplasia is produced by an autosomal recessive inheritance secondary to mutation in the short arm of chromosome 4. The syndrome affects multiple organs. It is described as a clinical tetrad that involves chondrodysplasia, ectodermal dysplasia, polydactyly and congenital heart defects. It is only known from reports and case series. We present a three months old male, without relevant family history, who presented chondrodysplasia, upper lip merged to palate, bilateral sinpolydactyly in the hands, developmental dysplasia of the hip, narrow chest with short ribs, and heart defects. This case is the first report of EVC in Peruvian literature.(AU)

Defecto del canal auriculoventricular, aurícula única y atresia tricuspídea como parte de un caso de síndrome de Ellis-Van Creveld. / [Atrioventricular canal defect, single atrium and tricuspid atresia as part of a case of Ellis-Van Creveld syndrome].

Ellis-Van Creveld Syndrome or chondrectodermal dysplasia is produced by an autosomal recessive inheritance secondary to mutation in the short arm of chromosome 4. The syndrome affects multiple organs. It is described as a clinical tetrad that involves chondrodysplasia, ectodermal dysplasia, polydactyly and congenital heart defects. It is only known from reports and case series. We present a three months old male, without relevant family history, who presented chondrodysplasia, upper lip merged to palate, bilateral sinpolydactyly in the hands, developmental dysplasia of the hip, narrow chest with short ribs, and heart defects. This case is the first report of EVC in Peruvian literature.

Diagnóstico pré-natal de atresia tricúspide tipo IIC com atresia aórtica / Prenatal diagnosis of tricuspid atresia IIC associated with aortic atresia

Introdução: A atresia tricúspide é uma cardiopatia rara, sendo sua associação com discordância atrioventricular e atresia aórtica ainda mais rara. Objetivo: Relatar caso de associação cardíaca rara, reiterando o papel do ecocardiograma fetal no diagnóstico precoce das malformações cardíacas complexas. Relato: Recém-nascido com diagnóstico pré-natal de ausência de conexão direita, ventrículo direito hipoplásico, via de saída única pulmonar emergindo do ventrículo esquerdo e arco aórtico hipoplásico foi submetido à cirurgia de Norwood-Sano, com 48 horas de vida, com boa evolução. Conclusão: Os achados ecocardiográficos no feto predisseram a necessidade de intervenção neonatal precoce e asseguraram o manejo pós-natal adequado.

Atrioventricular septal defect with coexisting tricuspid atresia.

We describe two infants having an atrioventricular septal defect in the setting of a double inlet atrioventricular connection, but with patency of the left-sided valvar orifice and an imperforate right-sided valvar component, and a further case with atrioventricular septal defect and an imperforate Ebstein's malformation, all producing the haemodynamic effect of tricuspid atresia. We make comparisons with the arrangement in trisomy 16 mice, in whom deficient atrioventricular septation is seen at times with the common atrioventricular junction exclusively connected to the left ventricle, a situation similar to that seen in two of our infants. We also review previous reports emphasising the important theoretical implication of the findings despite their rarity.