274 results on '"Fernando Hornero"'
Search Results
252. Valoración de los injertos coronarios con TC multicorte
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Jordi Estornell, Fernando Hornero, and Vicente Cervera
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business.industry ,Medicine ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine - Published
- 2003
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253. 69. Estrategias de analgesia en cirugía cardíaca mínimamente invasiva vía toracotomía: Bloqueo paravertebral continuo frente a analgesia endovenosa
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S. Cánovas, Juan Martínez-León, Federico Paredes, Elio Martín, Paula Carmona, A. García, I. Casanova, Fernando Hornero, R. García, and Oscar Gil
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Gynecology ,medicine.medical_specialty ,business.industry ,lcsh:R ,lcsh:Surgery ,medicine ,lcsh:Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business - Abstract
Objetivos Establecer la calidad de control analgesico de dos esquemas de analgesia: bloqueo paravertebral continuo (grupo BPVC) frente a analgesia endovenosa (grupo IV) tras cirugia cardiaca minimamente invasiva (CCMI) via abordaje de minitoracotomia (Heart-Port® e implante valvular aortico transcateter [TAVI] transapical). Material y metodos Estudio retrospectivo. Protocolo anestesico postoperatorio comun. Protocolos de analgesia mantenidos durante las primeras 48 h: grupo I V, infusion continua de cloruro morfico 0,5%/1-4 ml/h + paracetamol 1 g/6 h; grupo BPVC, infusion continua y dosis autoadministradas de ropivacaina 0,2% por cateter paravertebral introducido preope-ratoriamente (T4-T5) + paracetamol 1 g/6 h endovenoso. Variables postoperatorias: tiempo de ventilacion mecanica, estancia en unidad de cuidados intensivos (UCI) y hospitalaria global, incidencia de complicaciones. Resultados Cuarenta y ocho pacientes fueron incluidos en el estudio, 28 en el grupo IV (20 Heart-Port® y 8 TAVI transapical) y 20 en el grupo BPVC (14 Heart-Port® y 6 TAVI transapical). Ambos grupos resultaron comparables en las variables demograficas y preoperatorias. El tiempo de ventilacion mecanica y la estancia en UCI fueron significativamente menores en el grupo BPVC (Tabla 1). No se registraron eventos adversos en relacion con la aplicacion de cateter paravertebral en el postoperatorio. Conclusiones La analgesia por bloqueo paravertebral continuo es un procedimiento seguro y eficiente para el control analgesico en la CCMI por abordaje de minitoracotomia. Tabla 1. Tiempo de extubacion ≤ Estancia en UCI (dias) Estancia hospitalaria total (dias) 4 h > 4 h Grupo IV 28,6% 71,4% 2,42 ± 0,76 6,00 ± 3,39 Grupo BPVC 69,2% 30,8% 1,69 ± 0,85 5,69 ± 2,59 p
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- 2012
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254. 156. Insuficiencia Valvular Mitral: Etiología, Supervivencia y Resultados Funcionales de la Cirugía Reparadora
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Oscar Gil, J. Martínez León, S. Cánovas, Elio Martín, Federico Paredes, R. García Fuster, Fernando Hornero, and A. García
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Gynecology ,medicine.medical_specialty ,business.industry ,lcsh:R ,lcsh:Surgery ,medicine ,lcsh:Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business - Abstract
Objetivos etiologia y otros factores pueden variar los resultados de la reparacion mitral. Analizamos supervivencia y durabilidad en un grupo de pacientes de diversa etiologia. Material y metodos cuatrocientos seis pacientes fueron intervenidos de reparacion mitral (1997–2011) con edades entre 19–84 anos; 156 mujeres (38,4%); 57,1% en grado New York Heart Association [NYHA] III-IV; cinco grupos: degenerativa (grupo D), 203; isquemica (grupo I), 90; funcional no isquemica (grupo F), 19; reumatica (grupo R), 61 y endocarditis (grupo E), 33. Se utilizo anuloplastia sobrecorrectora en grupos I (mas derivacion coronaria) y F. Grupo D: reseccion cuadrangular (133), neocuerdas (64), transposicion cuerdas (10), Alfieri (13), anuloplastia aislada (6). Diversas tecnicas con reseccion y reconstruccion fueron empleadas en R y E. Resultados dieciocho exitus en 30 primeros dias poscirugia (4,4%), mortalidad por grupos: 3,4, 4,4, 0, 6,6 y 10%, respectivamente. Supervivencia actuarial: 86 ± 1% y 70 ± 4% a 5 y 10 anos. La mortalidad tardia fue mayor en funcionales e isquemicas (31,6 y 20%), siendo en D, R y E: 12,3, 11,5 y 13,3%. Mayor durabilidad en valvulopatia degenerativa ( vs no degenerativa) libres de insuficiencia grado III-IV/IV: 86 ± 2 frente a 84 ± 2% (p = 0,46) los primeros 5 anos, y 82 ± 3 frente a 54 ± 1% (p = 0,02), posteriormente. El grupo R se asocio a recidiva grado III ( odds ratio [OR]: 1,98; intervalo de confianza [IC] 95%: 1,01–3,89; p = 0,05) y grado IV (OR: 3,31; IC 95%: 1,17–9,32; p = 0,02). Catorce pacientes precisaron sustitucion protesica: 3, 1, 1, 6 y 3 en los grupos respectivos. Conclusiones los resultados globales de la cirugia reparadora fueron satisfactorios. Supervivencia, tasa de recidiva y reoperacion fueron excelentes en valvulopatia degenerativa. La reumatica se asocio a menor durabilidad, y la isquemica y funcional mostraron menor supervivencia.
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- 2012
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255. 59. Estudio multicéntrico retrospectivo de comparación de dos dosis diferentes de ácido tranexámico en cirugía cardíaca
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Juan Martínez-León, S. Cánovas, Elio Martín, R. García, A. García, Federico Paredes, J.J. Peña, J. Llagunes, E. Mateo, Oscar Gil, and Fernando Hornero
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Gynecology ,medicine.medical_specialty ,business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business - Abstract
Resultados postoperatorios de dos pautas de ácido tranexámico (AT) durante circulación extracorpórea (CEC). Métodos: Estudio retrospectivo. Ciento cuarenta y cuatro pacientes consecutivos en tres centros de la Comunidad Valenciana. Criterios exclusión: urgente/emergente; reoperación; cirugía aórtica; suspensión acenocumarol inferior a 2 días y clopidogrel inferior a 5 días; historia de anemia/trombopatía/ coagulopatía; tiempo CEC superior a 300 min; creatininemia superior a 2 mg/dl; alérgicos al AT. Grupo A (72 pacientes): carga 20 mg/kg + perfusión 4 mg/kg/h + 100 mg cebado CEC. Grupo B (72 pacientes): carga de 10 mg/kg + perfusión 2 mg/ kg/h + 50 mg cebado CEC. Variables pre/intraoperatorias y postoperatorias (débito en 6, 12 y 24 h, número/tipo de hemoderivados en primeras 24 h, reintervención por sangrado, eventos adversos en primeras 48 h). Pacientes con sangrado superior al percentil 90 en cada una de las horas registro se consideraron con sangrado aumentado. Resultados: Grupos comparables. La incidencia de sangrado aumentado fue superior en el grupo B a las 6 y 12 h (p < 0,05). El grupo B presentó mayor necesidad de reintervención por sangrado (5,56 [4] vs 1,39% [1]; p = 0,172). El grupo A presen-tó un caso aislado de convulsiones. No existieron diferencias significativas en necesidades transfusionales. La incidencia conjunta de sangrado aumentado + reintervención + transfusión igual o superior a tres concentrados de hematíes fue inferior en el grupo A (5,56% [4]) vs grupo B (13,89% [10]); p = 0,044. El análisis multivariante demostró que la pertenencia al grupo A fue un factor protector independiente de eventos de sangra-do excesivo en las 6 h (odds ratio [OR]: 0,615; p < 0,017), 12 h (OR: 0,794; p = 0,042) y del evento adverso conjunto (OR: 0,615; p = 0,002). Conclusiones: La pauta de AT del grupo A reduce significativamente el sangrado en las primeras 12 h del postoperatorio frente a la del grupo B, aunque no ha demostrado reducir las necesidades transfusionales.
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- 2012
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256. 354. Lesión de tronco principal izquierdo y cirugía coronaria: Diferente efecto en la supervivencia según la edad
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A. García, R. García Fuster, Oscar Gil, Elio Martín, S. Cánovas, Fernando Hornero, J. Martínez León, and Federico Paredes
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Gynecology ,medicine.medical_specialty ,business.industry ,lcsh:R ,lcsh:Surgery ,medicine ,lcsh:Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business - Abstract
La lesión grave de tronco coronario izquierdo (TCI) suele entrañar un mayor riesgo quirúrgico, especialmente si existe inestabilidad clínica. Su efecto en la supervivencia tardía es menos claro, especialmente en edades avanzadas. Valoramos su impacto pronóstico considerando el factor edad. Material y métodos: Tres mil quinientos un pacientes fueron intervenidos de cirugía coronaria aislada entre enero de 1995 – junio de 2011. Se clasificaron en grupo A: edad inferior a 65 años, grupo B: edad igual o superior a 65 años; 303 (19%) y 522 (27,3%) pacientes tenían lesión TCI grave. Se estudió el perfil de riesgo, técnica quirúrgica e influencia en la supervivencia. Resultados: Los pacientes con lesión TCI tenían peor grado funcional (p
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- 2012
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257. 65. Embolización de fuga periprotésica mitral por abordaje transapical: A propósito de un caso. Experiencia inicial en nuestro medio
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Elio Martín, A. Berenguer, Fernando Hornero, R. García, S. Cánovas, F. Pomar, Juan Martínez-León, S. Morell, and Oscar Gil
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business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business ,Humanities - Abstract
Objetivos la aplicacion multidisciplinaria de tecnicas de intervencionismo y cirugia cardiaca permite nuevas posibilidades de tratamiento ajustadas a diferentes escenarios clinicos. Exponemos nuestra experiencia inicial de embolizacion de fuga periprotesica mitral posterior por abordaje transapical. Material y metodos mujer, 77 anos, diabetica, hipertensa, caquectica, hipotiroidea, intervenida de sustitucion valvular mitral (SVM) por enfermedad reumatica (1977). Reintervenida por endocarditis protesica por S. epidermidis (septiembre de 2011) con nueva SVM. Dehiscencia posterior con fuga perivalvular grave causandole edema agudo de pulmon (noviembre de 2011). Ante inestabilidad clinica + fragilidad + EuroSCORE logistico superior a 50%, se decide embolizacion transapical mediante dispositivo/s Amplatzer®. Abordaje por toracotomia izquierda (5 cm) sobre apex localizado por ecocardiografia transtoracica. Exposicion de apex, dos bolsas de tabaco concentricas en torno a introductor (8 Fr). Procedimiento guiado por ecocardiografia transesofagica 3D y radioscopia. Cadena de seguridad con cobertura de asistencia circulatoria. Loop intracardiaco por paso de guia por dehiscencia periprotesica y enclavamiento en vena pulmonar superior derecha. Liberacion de dos dispositivos consecutivos hasta el cierre completo del defecto perivalvular, sin regurgitacion residual (Fig. 1). Resultados estancia unidad de cuidados intensivos: 4 dias; sala de hospitalizacion: 5 dias. Alta clinicamente compensada, New York Heart Association (NYHA) I y con normofuncion protesica mitral. Conclusiones a pesar de tratarse de una experiencia inicial en nuestro medio, la embolizacion de fugas perivalvulares constituye una alternativa multidisciplinaria, segura y que permite el tratamiento de pacientes con alto riesgo/fragilidad para el abordaje quirurgico convencional.
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- 2012
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258. 62. Nuevo método simple, rápido y seguro para acceso arterial periférico en cirugía cardíaca mínimamente invasiva e implante valvular aórtico transfemoral
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A. García, S. Cánovas, Federico Paredes, Elio Martín, Oscar Gil, Fernando Hornero, Juan Martínez-León, and R. García
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business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine - Abstract
Objetivos Describir nuestra experiencia con una tecnica de abordaje vascular periferico en procedimientos de cirugia cardiaca minimamente invasiva (CCMI): Heart-Port® e implante valvular aortico transfemoral (TAVI). Material y metodos Analisis en laboratorio experimental y practica quirurgica. Procedimiento: incision en pliegue inguinal (3–4 cm). Exposicion de vaso/s femoral/es sin diseccion ni loop vascular. En mitad superior del vaso, dos puntos longitudinales, intramurales, en «U», apoyados a ambos lados del eje (Fig. 1). Canulacion por tecnica de Seldinger en punto medio del vaso, equidistante de ambos pares de parches. Decanulacion por anudado alternativo. En TAVI, control angiografico sistematico. Resultados Ochenta y un pacientes sometidos a procedimientos de CCMI: 52 Heart-Port® y 29 TAVI-transfemoral. Mortalidad global precoz: 2 pacientes (TAVI), sin relacion con complicaciones vasculares. Ausencia de morbilidad asociada al abordaje en el grupo de Heart-Port®. En TAVI, una diseccion focal iliaca, un hematoma retroperitoneal y un caso de linforrea, resueltos con tratamiento conservador. Ausencia de isquemia aguda/hematoma/seudoaneurisma/reparacion quirurgica o endovascular o limitacion funcional basal. El analisis en laboratorio demostro efecto de bolsa de tabaco solo en el sentido longitudinal, sin causar estenosis transversal. Conclusiones Este nuevo metodo de acceso arterial periferico puede ser aplicado a diferentes procedimientos de CCMI, resultando simple (2 suturas y tecnica Seldinger), reproducible, rapido (no requiere reconstruccion tras canulacion) y seguro (no requiere pinzado vascular, tecnica Seldinger a cielo abierto, baja tasa de complicaciones). Download : Download full-size image Figura 1 . Vista tridimensional y en seccion transversal de la tecnica: dos puntos en «U» longitudinales al eje vascular apoyados en sendos pares de parches. Punto negro: canulacion por tecnica Seldinger.
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- 2012
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259. To the Editor, Comments on Esophageal Luminal Temperature Measurement During Radiofrequency Ablation of Left Atrium
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Enrique Berjano, Fernando Hornero, and Juan L Lequerica
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medicine.medical_specialty ,business.industry ,Radiofrequency ablation ,Left atrium ,law.invention ,medicine.anatomical_structure ,Text mining ,law ,Physiology (medical) ,Internal medicine ,medicine ,Cardiology ,Radiology ,Cardiology and Cardiovascular Medicine ,business - Published
- 2008
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260. Prognostic value of chronic obstructive pulmonary disease in coronary artery bypass grafting☆
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Fuster, Rafael García, primary, Argudo, José A. Montero, additional, Albarova, Oscar Gil, additional, Sos, Fernando Hornero, additional, López, Sergio Cánovas, additional, Codoñer, María Bueno, additional, Miñano, José A. Buendía, additional, and Albarran, Ignacio Rodríguez, additional
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- 2006
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261. Left ventricular mass index in aortic valve surgery: a new index for early valve replacement?☆
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Fuster, Rafael Garcı́a, primary, Argudo, José A.Montero, additional, Albarova, Oscar Gil, additional, Sos, Fernando Hornero, additional, López, Sergio Cánovas, additional, Sorlı́, Ma José Dalmau, additional, Codoñer, Marı́a Bueno, additional, and Miñano, José A.Buendı́a, additional
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- 2003
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262. Reply to Misawa
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Sergio Cánovas López, Fernando Hornero Sos, Oscar Gil Albarova, Rafael García Fuster, Ma José Dalmau Sorlí, María Bueno Codoñer, José A. Montero Argudo, and José A. Buendía Miñano
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Afterload ,business.industry ,Internal medicine ,Ventricular pressure ,Cardiology ,Medicine ,Surgery ,General Medicine ,Cardiology and Cardiovascular Medicine ,business - Published
- 2003
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263. Úlcera penetrante arteriosclerótica de aorta descendente
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Fernando Hornero Sos, José A. Montero Argudo, and Vicente Cervera Deval
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medicine.medical_specialty ,Aorta ,Text mining ,Aneurysm ,Ulcer surgery ,business.industry ,medicine.artery ,MEDLINE ,Medicine ,business ,medicine.disease ,Cardiology and Cardiovascular Medicine ,Surgery - Published
- 2003
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264. Extensive dissection in left coronary artery
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Maria J. Dalmau, Fernando Hornero, Sergio Cánovas, and José Anastasio Montero
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Adult ,Male ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Arterial disease ,business.industry ,Vascular disease ,medicine.medical_treatment ,Stent ,Coronary Disease ,General Medicine ,Dissection (medical) ,Coronary Angiography ,medicine.disease ,Coronary heart disease ,Left coronary artery ,medicine.artery ,medicine ,Humans ,Surgery ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Tissue Dissection - Published
- 2001
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265. Left atrium reduction to treat atrial fibrillation cause by mitral valvulopathy
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R. García, Fernando Hornero, J.L. Perez, Oscar Gil, F. Atienza, S. Cánovas, Maria J. Dalmau, E. Berjano, and J.A. Montero
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,P wave ,Left atrium ,Atrial fibrillation ,medicine.disease ,medicine.anatomical_structure ,Internal medicine ,Heart failure ,Cardiology ,Medicine ,Cardiology and Cardiovascular Medicine ,business ,Reduction (orthopedic surgery) - Published
- 2000
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266. Electrodes for linear radiofrecuency ablation of atrial fibrillation; A comparative in vitro study
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Maria J. Dalmau, E. Berjano, S. Cánovas, Fernando Hornero, and J.A. Montero
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medicine.medical_specialty ,business.industry ,Internal medicine ,Heart failure ,Ablation of atrial fibrillation ,medicine ,Cardiology ,In vitro study ,Cardiology and Cardiovascular Medicine ,medicine.disease ,business - Published
- 2000
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267. A cooled water-irrigated intraesophageal balloon to prevent thermal injury during cardiac ablation: experimental study based on an agar phantom.
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Juan L Lequerica, Enrique J Berjano, Maria Herrero, Lemuel Melecio, and Fernando Hornero
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ESOPHAGUS ,CATHETER ablation ,HEART atrium ,MYOCARDIUM - Abstract
A great deal of current research is directed to finding a way to minimize thermal injury in the esophagus during radiofrequency catheter ablation of the atrium. A recent clinical study employing a cooling intraesophageal balloon reported a reduction of the temperature in the esophageal lumen. However, it could not be determined whether the deeper muscular layer of the esophagus was cooled enough to prevent injury. We built a model based on an agar phantom in order to experimentally study the thermal behavior of this balloon by measuring the temperature not only on the balloon, but also at a hypothetical point between the esophageal lumen and myocardium (2 mm distant). Controlled temperature (55 °C) ablations were conducted for 120 s. The results showed that (1) the cooling balloon provides a reduction in the final temperature reached, both on the balloon surface and at a distance of 2 mm; (2) coolant temperature has a significant effect on the temperature measured at 2 mm from the esophageal lumen (it has a less effect on the temperature measured on the balloon surface) and (3) the pre-cooling period has a significant effect on the temperature measured on the balloon surface (the effect on the temperature measured 2 mm away is small). The results were in good agreement with those obtained in a previous clinical study. The study suggests that the cooling balloon gives thermal protection to the esophagus when a minimum pre-cooling period of 2 min is programmed at a coolant temperature of 5 °C or less. [ABSTRACT FROM AUTHOR]
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- 2008
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268. Esophageal temperature monitoring during radiofrequency catheter ablation: experimental study based on an agar phantom model.
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Ignacio Rodr, Juan L Lequerica, Enrique J Berjano, Maria Herrero, and Fernando Hornero
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CATHETER ablation ,RADIO frequency ,ELECTRODES ,ESOPHAGUS - Abstract
Although previous studies have established the feasibility of monitoring esophageal temperature during radiofrequency cardiac ablation using an esophageal temperature probe (ETP), some questions remain regarding its efficacy. The aims of this study were to study the effect of the location of the ETP on the temperature reached, and to test the characteristics of ETP as used in clinical practice. We constructed an agar phantom to model the thermal and electrical characteristics of the biological tissues (left atrium, esophagus and connective tissue). The ETP was positioned at 6.5 mm from an ablation electrode and at distances of 0, 5, 10, 15, 20 mm from the catheter axis. A thermocouple was located on the probe to measure the actual temperature of the external esophageal layer during the ablations (55 °C, 60 s). The mean temperatures reached at the thermocouple were significantly higher than those measured by the ETP (48.3 ± 1.9 °C versus 39.6 ± 1.1 °C). The temperature values measured with the ETP were significantly lower when the probe was located further from the catheter axis (up to 2.5 °C lower when the distance from the probe-catheter axis was 2 cm). The dynamic calibration of the ETP showed a mean value for the time constant of 8 s. In conclusion, the temperature measured by the ETP always underestimates the temperature reached in the thermocouple. This fact can be explained by the distance gap between the thermocouple and probe and by the dynamic response of the ETP. The longer the distance between the ETP and catheter axis, the higher is the temperature difference. [ABSTRACT FROM AUTHOR]
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- 2007
269. Arritmias ventriculares. Aspectos generales
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Jesús Almendral and Fernando Hornero
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business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,lcsh:RD1-811 ,Ablation ,Ablación ,Ventricular arrhythmias ,Cirugía ,cardiovascular system ,Medicine ,Surgery ,cardiovascular diseases ,Cardiology and Cardiovascular Medicine ,business ,Humanities ,Arritmias ventriculares - Abstract
La cirugía de la arritmia ventricular ha desaparecido casi por completo en las últimas décadas con la aparición del desfibrilador automático implantable. En la actualidad, conocemos mejor las limitaciones del desfibrilador y los progresos en la ablación por catéter. Avances tecnológicos en el mapeo ventricular y en los sistemas de ablación con catéter están cambiando el planteamiento terapéutico a favor de soluciones más eficaces. A su vez, la actual cirugía de la arritmia ventricular tiene baja morbimortalidad, y dispone del apoyo tecnológico de la electrofisiología para ser una alternativa vigente en algunos pacientes. La cirugía de la arritmia ventricular requiere comprender la etiología y el mecanismo de la arritmia, conocer el riesgo que plantea la arritmia, y el riesgo-beneficio del tratamiento quirúrgico.Surgery for ventricular arrhythmia has almost disappeared in recent decades with the advent of the automatic implantable defibrillator. At present, we know better the limitations of the implantable defibrillator and the technical progress of catheter ablation. Technological advances in ventricular mapping and ablation systems enable catheter ablation to change the therapeutic approach for more effective solutions. In turn, surgery for ventricular arrhythmia has low morbidity and mortality, and with the support of the electrophysiology technology, is it a real alternative in some patients. Surgery for ventricular arrhythmia requires understanding the etiology and mechanism of the arrhythmia, determine the risk posed by the arrhythmia, and risk-benefit of surgical treatment.
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270. Ventricular artifacts cancellation from atrial epicardial recordings in atrial tachyarrhythmias
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David Moratal, Jose J. Rieta, Fernando Hornero, and Raúl Alcaraz
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Heart Ventricles ,P wave ,Ventricular reduction ,Clinical Practice ,Electrocardiography ,Waveform analysis ,Internal medicine ,Atrial Fibrillation ,cardiovascular system ,medicine ,Cardiology ,Humans ,cardiovascular diseases ,Heart Atria ,business ,Artifacts - Abstract
Atrial tachyarrhythmias are a very common cardiovascular disease in clinical practice with an incidence that doubles with each advancing decade. A key issue to understand their pathophysiological mechanisms is the analysis and interpretation of atrial electrograms (AEG). To properly study these signals, ventricular artifacts have to be removed from the AEG. In this work, a new application of independent component analysis (ICA) to the AEG is presented where ventricular artifacts are removed from atrial recordings making use of only one reference lead. Therefore the technique is suitable when multi-lead recordings are unavailable as in atrial implantable cardioverter-defibrilators. The methodology has been compared with traditional techniques on a database of 20 patients. Performance was evaluated through atrial waveform similarity (S) and ventricular activity reduction (V D R) as a function of atrial rhythm regularity on a beat-by-beat basis. When the atrial tachyarrhythmia is quite regular, results show that ICA preserves the atrial waveform better than the other methods (median S = 99:64%) whereas maintaining ventricular reduction (median VDR = 6:32dB).
271. Derivation of atrial surface reentries applying ICA to the standard electrocardiogram of patients in postoperative atrial fibrillation
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Juan Sanchis, David Moratal, C. Vaya, Jose J. Rieta, Fernando Hornero, and C. Sanchez
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medicine.medical_specialty ,Computer science ,Internal medicine ,Standard electrocardiogram ,cardiovascular system ,medicine ,Cardiology ,Atrial fibrillation ,cardiovascular diseases ,Derivation ,Atrial arrhythmias ,medicine.disease ,Cardiac surgery - Abstract
In this study a set of patients undergoing cardiac surgery, that developed postoperative atrial fibrillation, were selected to verify if the information available on the atrial surface can be derived with the only use of body surface recordings. Standard electrocardiograms were obtained and processed by independent component analysis (ICA) to extract a unified atrial activity (AA) that takes into account the atrial contribution from each surface lead. Next, this AA has been compared with internal recordings. Main atrial frequency, cross-correlation between power spectral densities and spectral coherence have been obtained in this study. Results show that information provided by surface ICA-estimated AA allows to derive atrial surface reentries in AF patients, thus improving the noninvasive knowledge of atrial arrhythmias when internal atrial recordings are unavailable.
272. Anuloplastia tricúspide de de Vega: hito quirúrgico con marca España
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Fernando Hornero
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business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,Medicine ,Surgery ,lcsh:RD1-811 ,Cardiology and Cardiovascular Medicine ,business ,Humanities - Full Text
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273. Factor anatómico adverso en ablación de fibrilación auricular
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Elio Martín, A. García, and Fernando Hornero
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Anatomy Surgery ,business.industry ,lcsh:R ,lcsh:Surgery ,lcsh:Medicine ,Arritmia ,lcsh:RD1-811 ,Atrial fibrillation ,Fibrilación auricular ,Cirugía ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Anatomía ,Humanities ,Arrhythmia - Abstract
El resultado de la ablación de la fibriladón auricular depende, entre otros factores, de la homogeneidad de la superficie tratada. La TC y la angio-Rm cardíaca permiten estudiar la anatomía auricular y su relación con las estructuras adyacentes. En algunos pacientes, el análisis externo y endoluminal con imágenes de reconstrucción tridimensional ha mostrado la presencia de pequeños apéndices (pouches) en la pared de la aurícula izquierda. Estas variantes anatómicas podrían interferir en el buen contacto del catéter de ablación quirúrgico con el tejido. Las lesiones de ablación intraoperatoria podrían no ser continuas, pudiendo crear un sustrato para la reentrada.The results of ablation for atrial fibrillation depend, among other factors, of the homogeneity of the treated surface. Computed tomography and cardiac MRI allow for the study of atrial anatomy and its relation with the surrounding structures. in some patients, external and endoluminal analysis with 3D reconstruction has shown small-sized pouches in the left atrial wall. These anatomical variants could interfere with the appropriate contact of the ablation catheter with the tissue. Intraoperative ablation lines could not be homogeneous leaving substrate for reentry.
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274. Patient-prosthesis mismatch in aortic valve replacement: really tolerable?
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Fuster, Rafael García, Montero Argudo, José A., Albarova, Oscar Gil, Sos, Fernando Hornero, López, Sergio Cánovas, Codoñer, María Bueno, Buendía Miñano, José A., and Albarran, Ignacio Rodríguez
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ARTIFICIAL implants , *PROSTHETICS , *BIOMEDICAL materials , *MORTALITY - Abstract
Abstract: Objective: Several studies have demonstrated favorable results despite patient-prosthesis mismatch after aortic valve replacement with the use of third generation prostheses. Our aim was to determine whether this mismatch is always tolerable. Methods: A clinical-echocardiographic study has been performed in 339 consecutive patients who underwent aortic valve replacement because of aortic stenosis. In-hospital outcome and left ventricular mass index regression (1st month-1st year) were analyzed in the presence or absence of mismatch (indexed effective orifice area ≤0.85cm2/m2). The influence of high degrees of preoperative left ventricular mass on in-hospital mortality has also been evaluated. Left ventricular mass index was considered increased if the calculated value was over the superior quartile of the frequency distribution of all the values observed in both sexes. Results: Mismatch was found in 38% of the patients. In the absence of mismatch, the absolute mass regression was proportional to the preoperative left ventricular mass. This regression was higher in patients with increased left ventricular mass indexed (vs not increased): −38.0±7.8 vs −8.8±4.7g/m2, p<0.01 (1st month) and −67.7±16.9vs −23.5±6.7g/m2, p<0.05 (1st year). Mass regression was impaired in the presence of mismatch, particularly, in patients with previously increased left ventricular mass: −8.2±11.6 vs −5.6±6.3g/m2 (p=0.83) and −24.6±12.6 vs −11.7±10.5g/m2 (p=0.54). This worse regression was reflected on a 100% incidence of residual hypertrophy at follow-up (1st month-1st year). In the presence of mismatch, increased ventricular mass was associated with higher mortality: 14.7% vs 2.1% (p<0.01). In the absence of mismatch, ventricular mass was not associated with mortality: 4.1 vs 2.5% (p=0.55). Conclusions: In patients with severe ventricular hypertrophy it may be important to elude patient-prosthesis mismatch to avoid a significant increase in mortality and improve ventricular mass regression. Mismatch may be tolerable in those patients with lesser degree of hypertrophy. [Copyright &y& Elsevier]
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- 2005
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