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Introducción y objetivo: El tratamiento óptimo de la taquicardia fetal es todavía objeto de controversia. El objetivo de este estudio es revisar el manejo y la evolución de los fetos diagnosticados de taquicardia en 9 centros españoles. Método: Se llevó a cabo un estudio multicéntrico retrospectivo, con análisis de todos los fetos con taquicardia diagnosticados en 9 centros españoles entre enero de 2008 y septiembre de 2010. Resultados: Se registraron 37 casos, un 30% hidrópicos. Un total de 26 casos no presentaba hidropesía; 4 de ellos se diagnosticaron de flutter auricular –cardioversión con éxito en todos, intraútero o posnatalmente– y 22 de taquicardia supraventricular (TSV), 17 con intervalo ventriculoauricular (VA) corto y 5 con intervalo VA largo. El fármaco inicial en la mayoría de los casos fue la digoxina. La taquicardia se controló prenatalmente en el 93% de las TSV con VA corto y en el 50% con VA largo. La digoxina resultó eficaz en los fetos con VA corto, pero ineficaz en los casos con VA largo (p= 0,019). Un feto con TSV con disfunción ventricular falleció. Asociaron hidropesía 11 casos, todos ellos diagnosticados de TSV. La estrategia terapéutica fue muy variable en este grupo. Fallecieron 5 de los fetos hidrópicos: 1 posnatalmente, 2 intraútero muy precozmente tras empezar el tratamiento, y 2 intraútero a pesar de haber convertido a ritmo sinusal con éxito (1 estando en tratamiento con flecainida y 1 con sotalol) . Conclusiones: En nuestra serie se ha registrado una mortalidad muy alta de los fetos hidrópicos. Proponemos un nuevo protocolo de tratamiento concordado para mejorar la evolución de la taquicardia fetal (AU)

Introduction and objective: Optimal treatment for fetal tachycardia is still controversial. The aim of this study is to review the actual management and outcome of fetal tachycardia in 9 Spanish centers. Method: Retrospective multicentric study: analysis of all fetuses with tachycardia diagnosed at 9 Spanish centers between January 2008 and September 2010. Results: 37 cases were registered, 30% of which were hydropic. We had 26 no hydropic cases, of which 4 atrial flutter –all of them successfully cardioverted intrautero or after delivery– and 22 with supraventricular tachycardia (SVT), of which 17 short ventriculo-auricular (VA) interval and 5 long VA interval. Digoxin was the drug of choice in most cases. Prenatal control of the tachycardia was achieved in 93% of treated SVT with short VA interval and 50% of long VA, being digoxine effective in short VA but not long VA interval (p= 0.019). 1 fetus with supraventricular tachycardia with ventricular dysfunction died. 11 cases were hydropic, all of them diagnosed as SVT. Management strategies were highly diverse in this group. 5 patients died: 1 after delivery, 2 intrautero very shortly after starting treatment, and 2 intrautero in spite of being successfully cardioverted to sinus rhythm (1 with sotalol, 1 with flecainide). Conclusions: Hydropic fetuses have shown a high mortality rate in our population, which calls for further studies and unification of criteria. Here we propose a common protocol aimed at improving the outcome of fetal tachycardia (AU)

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OBJETIVO: Revisar el manejo actual y la evolución de la bradicardia fetal en 9 centros españoles. MÉTODO: Estudio multicéntrico retrospectivo: análisis de todos los fetos con bradicardia diagnosticados en 9 centros españoles entre enero de 2008 y septiembre de 2010. Los mecanismos electrofisiológicos responsables de la bradicardia fetal se estudiaron mediante ecocardiografía. RESULTADOS: Se registraron 37 casos: 3 fetos con bradicardia sinusal, 15 con extrasistolia auricular no conducida y 19 con bloqueo auriculoventricular (AV) de alto grado. Bradicardia sinusal: el 100% asoció patologías severas. Extrasistolia auricular no conducida: excelente pronóstico, pero un caso desarrolló posnatalmente taquicardia supraventricular. Entre los bloqueos AV de alto grado, el 16% asociaban cardiopatía congénita con isomerismo, el 63% anticuerpos antiRo/SSA maternos y el 21% fueron de etiología desconocida. La mortalidad global de los bloqueos AV fue del 20% (37% si consideramos la interrupción voluntaria del embarazo). Factores de riesgo fueron: asociar una cardiopatía congénita, hídrops y/o disfunción ventricular. El tratamiento fue variable según el centro, se administraron corticoides en el 73% de los bloqueos de grado III inmunomediados y en el único caso de bloqueo de grado II inmunomediado. En un seguimiento medio de 18 meses, se implantaron marcapasos en el 58% de los bloqueo AV de alto grado. CONCLUSIONES: La bradicardia fetal sostenida precisa siempre de un estudio exhaustivo, incluso en el caso de la bradicardia sinusal. La extrasistolia auricular no conducida tiene buen pronóstico pero puede asociar taquicardia. El bloqueo AV de alto grado fetal tiene todavía una morbimortalidad significativa y su tratamiento es controvertido

OBJECTIVE: The aim of this study is to review the current management and outcomes of fetal bradycardia in 9 Spanish centers. METHODS: Retrospective multicenter study: analysis of all fetuses with bradycardia diagnosed between January 2008 and September 2010. Underlying mechanisms of fetal bradyarrhythmias were studied with echocardiography. RESULTS: A total of 37 cases were registered: 3 sinus bradycardia, 15 blocked atrial bigeminy, and 19 high grade atrioventricular blocks. Sinus bradycardia: 3 cases (100%) were associated with serious diseases. Blocked atrial bigeminy had an excellent outcome, except for one case with post-natal tachyarrhythmia. Of the atrioventricular blocks, 16% were related to congenital heart defects with isomerism, 63% related to the presence of maternal SSA/Ro antibodies, and 21% had unclear etiology. Overall mortality was 20% (37%, if terminations of pregnancy are taken into account). Risk factors for mortality were congenital heart disease, hydrops and/or ventricular dysfunction. Management strategies differed among centers. Steroids were administrated in 73% of immune-mediated atrioventricular blocks, including the only immune-mediated IInd grade block. More than half (58%) of atrioventricular blocks had a pacemaker implanted in a follow-up of 18 months. CONCLUSIONS: Sustained fetal bradycardia requires a comprehensive study in all cases, including those with sinus bradycardia. Blocked atrial bigeminy has a good prognosis, but tachyarrhythmias may develop. Heart block has significant mortality and morbidity rates, and its management is still highly controversial

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OBJECTIVE: The aim of this study is to review the current management and outcomes of fetal bradycardia in 9 Spanish centers. METHODS: Retrospective multicenter study: analysis of all fetuses with bradycardia diagnosed between January 2008 and September 2010. Underlying mechanisms of fetal bradyarrhythmias were studied with echocardiography. RESULTS: A total of 37 cases were registered: 3 sinus bradycardia, 15 blocked atrial bigeminy, and 19 high grade atrioventricular blocks. Sinus bradycardia: 3 cases (100%) were associated with serious diseases. Blocked atrial bigeminy had an excellent outcome, except for one case with post-natal tachyarrhythmia. Of the atrioventricular blocks, 16% were related to congenital heart defects with isomerism, 63% related to the presence of maternal SSA/Ro antibodies, and 21% had unclear etiology. Overall mortality was 20% (37%, if terminations of pregnancy are taken into account). Risk factors for mortality were congenital heart disease, hydrops and/or ventricular dysfunction. Management strategies differed among centers. Steroids were administrated in 73% of immune-mediated atrioventricular blocks, including the only immune-mediated IInd grade block. More than half (58%) of atrioventricular blocks had a pacemaker implanted in a follow-up of 18 months. CONCLUSIONS: Sustained fetal bradycardia requires a comprehensive study in all cases, including those with sinus bradycardia. Blocked atrial bigeminy has a good prognosis, but tachyarrhythmias may develop. Heart block has significant mortality and morbidity rates, and its management is still highly controversial.

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Introducción: Tras la implantación de un dispositivo de cierre del tabique interauricular, la mayoría de los centros llevan a cabo pautas de profilaxis antibiótica que disminuyan el riesgo de endocarditis infecciosa secundario a la presencia de un cuerpo extraño intracardíaco. Actualmente se suelen recomendar durante los primeros 6 meses tras la implantación, tras los que deja de llevarse a cabo siempre que no exista shunt residual. El objetivo de este estudio es valorar el grado de conocimiento, cumplimiento y adherencia a las recomendaciones de nuestro centro sobre la profilaxis de la endocarditis en los progenitores de pacientes a los que se les realizó un cierre percutáneo de una comunicación interauricular (CIA). Pacientes y métodos: Se ha realizado un estudio observacional retrospectivo de los 51 pacientes pediátricos a los que se les realizó un cierre percutáneo de CIA en el Complejo Hospitalario Universitario de La Coruña, entre los años 1999 y 2008.ResultadosSe estudió un total de 51 pacientes, con una media de seguimiento de 57,2 meses. El 75,7% de los progenitores conocía la profilaxis de la endocarditis, y este porcentaje fue mayor cuanto menos tiempo había pasado desde la intervención y cuanto mayor era el nivel de estudios de los padres. El 50% nunca dejó de llevar a cabo la profilaxis de la endocarditis. También se observó, en este caso, una relación con el nivel de estudios de los padres y con el tiempo que había pasado desde la intervención (p=0,004). El 73% de los pacientes nunca ha tenido que llevar a cabo la profilaxis de la endocarditis. Conclusiones: Las últimas guías sobre profilaxis antibiótica de la endocarditis son cada vez más restrictivas en cuanto a sus indicaciones a fin de promocionar un uso racional de los antibióticos. Son necesarios estudios más amplios con respecto a las indicaciones de la profilaxis antibiótica para la endocarditis en pacientes portadores de dispositivos intracardíacos a fin de establecer unas pautas concretas o basadas en la evidencia científica. Mientras tanto, es nuestra responsabilidad evitar la aplicación indiscriminada de antibióticos, haciendo partícipes a progenitores y a otros profesionales de la salud (AU)

Introduction: After the implantation of an intracardiac device for the closure of an atrial septal defect, most centres follow the guidelines for antibiotic prophylaxis to reduce the risk of infectious endocarditis, at least during the first 6 months after the implantation, if there is no evidence of residual shunt. The aim of this report is to evaluate the knowledge, fulfilment and adherence to the recommendations of our centre on the prevention of endocarditis, of the families of patients subjected to percutaneous closure of an ASD. Patients and Methods: We performed an observational retrospective study of 51 paediatric patients subjected to percutaneous closure of an ASD in the “Complejo Hospitalario Universitario de La Coruña”, between 1999 and 2008. Results: A total of 51 procedures were performed, with an average of follow-up of 57.2 months. 75.7% of the families knew about the prophylaxis of endocarditis. This percentage was higher if less time had passed since the intervention and was also higher depending on the educational level of the parents. A total of 50% never stopped carrying out the endocarditis prophylaxis. In this case, a relationship was also observed, with the educational level of the parents and with the time passed since the intervention (P=0.004). The majority (73%) of the patients never had to carry out endocarditis prophylaxis. Conclusiones: The latest guidelines on antibiotic prophylaxis of endocarditis are increasingly restrictive in their indications in order to promote a more rational use of antibiotics. More studies are needed on the indications of antibiotic prophylaxis in endocarditis in patients with an intracardiac device, in order to establish concrete or evidence-based guidelines. Meanwhile, it is our responsibility to avoid the indiscriminate application of antibiotics, and involve the families and other health professionals (AU)

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INTRODUCTION: After the implantation of an intracardiac device for the closure of an atrial septal defect, most centres follow the guidelines for antibiotic prophylaxis to reduce the risk of infectious endocarditis, at least during the first 6 months after the implantation, if there is no evidence of residual shunt. The aim of this report is to evaluate the knowledge, fulfillment and adherence to the recommendations of our centre on the prevention of endocarditis, of the families of patients subjected to percutaneous closure of an ASD. PATIENTS AND METHODS: We performed an observational retrospective study of 51 paediatric patients subjected to percutaneous closure of an ASD in the "Complejo Hospitalario Universitario de La Coruña", between 1999 and 2008. RESULTS: A total of 51 procedures were performed, with an average of follow-up of 57.2 months. 75.7% of the families knew about the prophylaxis of endocarditis. This percentage was higher if less time had passed since the intervention and was also higher depending on the educational level of the parents. A total of 50% never stopped carrying out the endocarditis prophylaxis. In this case, a relationship was also observed, with the educational level of the parents and with the time passed since the intervention (P=0.004). The majority (73%) of the patients never had to carry out endocarditis prophylaxis. CONCLUSIONS: The latest guidelines on antibiotic prophylaxis of endocarditis are increasingly restrictive in their indications in order to promote a more rational use of antibiotics. More studies are needed on the indications of antibiotic prophylaxis in endocarditis in patients with an intracardiac device, in order to establish concrete or evidence-based guidelines. Meanwhile, it is our responsibility to avoid the indiscriminate application of antibiotics, and involve the families and other health professionals.

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