Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 10 de 10
Filtrar
1.
Sci Rep ; 7(1): 17721, 2017 12 18.
Artigo em Inglês | MEDLINE | ID: mdl-29255250

RESUMO

This work demonstrates that the rf-sputtering technique, combined with appropriate heat treatments, is potentially effective to develop new materials and devices based on oxide-interface and strain engineering. We report a study of the structural-physical properties relationship of high crystalline quality, highly oriented and epitaxial thin films of the lead-free (K0.5Na0.5)0.985La0.005NbO3 (KNNLa) compound which were successfully deposited on Nb-doped SrTiO3 substrates, with orientations [100] (NSTO100) and [110] (NSTO110). The crystalline growth and the local ferroelectric and piezoelectric properties were evaluated by piezoresponse force microscopy combined with transmission electron microscopy and texture analysis by X-ray diffraction. Conditioned by the STO surface parameters, in the KNNLa films on NSTO100 coexist a commensurate [001]-tetragonal phase and two incommensurate [010]-monoclinic phases; while on NSTO110 the KNNLa films grew only in an incommensurate [101]-monoclinic phase. Both samples show excellent out-of-plane polarization switching patterns consistent with 180° domains walls; while for KNNLa/NSTO100 ferroelectric domains grow with the polarization pointing down, for KNNLa/NSTO110 they prefer to grow with the polarization pointing up. Comparing with previous reports on epitaxial KNN films, we find our samples to be of very high quality regarding their crystalline growth with highly ordered ferroelectric domains arrangements and, consequently, great potential for domain engineering.

2.
Angiología ; 66(5): 246-253, sept.-oct. 2014. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-128225

RESUMO

Una fístula aortoentérica (FAE) es una comunicación entre la aorta y un asa de intestino adyacente de manera directa o tras cirugía reconstructiva aórtica o endovascular. Es una entidad con una tasa de morbimortalidad asociada muy elevada, cuyo diagnóstico precisa un alto grado de sospecha según la clínica y datos indirectos de las técnicas de imagen (tomografía computarizada). La opción terapéutica más adecuada continúa siendo un tema controvertido. El tratamiento endovascular de esta complicación presenta unas tasas de morbimortalidad a corto plazo aparentemente menores, aunque su papel como tratamiento definitivo resulta muy discutible. El objetivo de este estudio es ofrecer una revisión actualizada de las modificaciones en el diagnóstico y manejo de las FAE


An aortoenteric fistula (AEF) is a communication between the aorta and an adjacent bowel loop, directly or due to reconstructive aortic or endovascular surgery. It has a very high associated morbidity and mortality rate, and the diagnosis requires a high index of suspicion based on clinical data and indirect imaging techniques (computed tomography). The most appropriate therapeutic option remains controversial. Endovascular treatment of this complication shows apparently lower morbidity and mortality rates in the short-term, although its role as a definitive treatment is very debatable. The objective of this study is to provide an update and review on changes in the diagnosis and management of AEF


Assuntos
Humanos , Masculino , Feminino , Hemorragia Gastrointestinal/mortalidade , Hemorragia Gastrointestinal/patologia , Aneurisma Aórtico/complicações , Aneurisma Aórtico/patologia , Aneurisma Infectado/patologia , Dor Abdominal/etiologia , Infecções/complicações , Infecções/patologia , Isquemia/complicações , Tomografia Computadorizada por Raios X , Endoscopia , Angiografia
3.
J Cardiovasc Surg (Torino) ; 52(3): 391-4, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19455091

RESUMO

We report a case of aortoenteric fistula (AEF) that occurred four years after endovascular abdominal aortic aneurysm repair (EVAR) with the original Gore Excluder endoprosthesis despite uncomplicated stent graft placement without endoleaks or migration on postoperative imaging studies; the patient was reoperated with a Cook aortouniiliac converter for endotension three months before the diagnosis of AEF. To our knowledge, this is the first reported case in the literature of an AEF after EVAR with the Excluder stent graft. Our case demonstrates that EVAR is not a guarantee against the development of AEF, and we suggest that all the patients with the first generation Excluder device should be closely followed-up; if sac enlargement is detected, early conversion to open repair or reinforcement of the entire old endograft should be considered.


Assuntos
Aneurisma da Aorta Abdominal/cirurgia , Doenças da Aorta/etiologia , Implante de Prótese Vascular/instrumentação , Prótese Vascular , Duodenopatias/etiologia , Procedimentos Endovasculares/instrumentação , Fístula Intestinal/etiologia , Stents , Fístula Vascular/etiologia , Aneurisma da Aorta Abdominal/diagnóstico por imagem , Aneurisma da Aorta Abdominal/fisiopatologia , Doenças da Aorta/diagnóstico por imagem , Doenças da Aorta/cirurgia , Aortografia/métodos , Implante de Prótese Vascular/efeitos adversos , Duodenopatias/diagnóstico por imagem , Duodenopatias/cirurgia , Procedimentos Endovasculares/efeitos adversos , Evolução Fatal , Humanos , Fístula Intestinal/diagnóstico por imagem , Fístula Intestinal/cirurgia , Masculino , Pessoa de Meia-Idade , Desenho de Prótese , Reoperação , Fatores de Tempo , Tomografia Computadorizada por Raios X , Fístula Vascular/diagnóstico por imagem , Fístula Vascular/cirurgia
4.
Angiología ; 60(5): 347-352, sept.-oct. 2008. ilus
Artigo em Es | IBECS | ID: ibc-68511

RESUMO

Introducción. Los trombos en la aorta torácica son poco frecuentes y constituyen una importante fuente de embolismos.El tratamiento endovascular ha mejorado las opciones terapeúticas hasta ahora reservadas a la tromboendarterectomíay/o a la anticoagulación sistémica. Caso clínico. Mujer de 52 años, fumadora, derivada desde otro centro pordolor abdominal difuso, náuseas, vómitos y hallazgo en la tomografía computarizada abdominal de oclusión de la arteriailíaca común izquierda, infartos renales bilaterales y defecto de repleción en la porción inferior de la aorta torácica.En el ecocardiograma transesofágico se observaba un trombo móvil de 7 × 23 mm en la aorta torácica. Se instauró el tratamientocon anticoagulación en dosis terapéuticas y se realizó una angiorresonancia magnética y una arteriografía; comoresultado de estas pruebas se observó un trombo flotante en la aorta torácica de 3 cm de longitud, fijado a la placaateroesclerótica, oclusión de la arteria renal izquierda e ilíaca izquierda. La exclusión del trombo se realizó mediante laliberación en la aorta torácica de una endoprótesis de 32 × 112 mm (Relay ®, Bolton Medical España), con acceso aórticoabdominal a través de una prótesis de dacron de 8 mm y un bypass aortofemoral izquierdo posterior (arteria ilíacacomún < 0,7 cm de diámetro). En la arteriografía de control intraoperatoria no se objetivaron imágenes de fuga ni defectosde repleción en la aorta torácica. La angiotomografía postoperatoria confirmó la exclusión del trombo. Se dio de altaa la paciente con tratamiento antiagregante; seis meses después de la intervención se encontraba asintomática. Conclusión.El tratamiento endovascular de estas lesiones constituye una nueva alternativa de tratamiento efectiva y seguray con menores tasas de morbimortalidad perioperatoria


Introduction. Thrombi rarely occur in the thoracic aorta and constitute an important source of embolisms.Endovascular treatment has improved the therapeutic options, which until recently were limited to thromboendarterectomyand/or systemic anticoagulation. Case report. A 52-year-old female smoker, who was referred from another health centrebecause of diffuse abdominal pain, nausea and vomiting; the findings from a computerised tomography scan of theabdomen showed occlusion of the left common iliac artery, bilateral renal infarction and filling defect in the lowerportion of the thoracic aorta. A transthoracic echocardiogram showed a 7 × 23 mm mobile thrombus in the thoracicaorta. Anticoagulation treatment was established in therapeutic doses and magnetic resonance angiography andarteriography were performed. The results of these tests revealed a 3 cm long floating thrombus in the thoracic aorta,which was attached to the atherosclerotic plaque, and occlusion of the left renal and left iliac arteries. Exclusion of the thrombus was performed by deploying a 32 × 112 mm stent (Relay ®, Bolton Medical España) in the thoracic aorta, withabdominal aortic access via an 8 mm Dacron graft and a posterior left aortofemoral bypass (common iliac artery < 0.7 cmin diameter). In the intraoperative control arteriography, no leaks or filling defects were observed in images of thethoracic aorta. The post-operative angiotomography confirmed the exclusion of the thrombus. The patient was dischargedfrom hospital with antiplatelet treatment; six months after the operation she remained asymptomatic. Conclusions. Theendovascular treatment of these lesions represents a new therapeutic alternative that is safe and effective and which haslower perioperative morbidity and mortality rates (AU)


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Trombose/cirurgia , Aorta Torácica/fisiopatologia , Aorta Torácica/cirurgia , Endarterectomia/métodos , Angiografia/métodos , Próteses e Implantes , Dor Abdominal/complicações , Dor Abdominal/etiologia
5.
Angiología ; 60(3): 189-198, mayo-jun. 2008. tab
Artigo em Es | IBECS | ID: ibc-67002

RESUMO

Introducción. El tratamiento endovascular en el sector iliaco, que comenzó a aplicarse en pacientes de alto riesgo,hoy día puede ser la primera opción terapéutica. Objetivo. Determinar los resultados de la angioplastia transluminalpercutánea en el sector iliaco, con o sin implantación de stent, estratificando el análisis según tipos de lesión TASC-2000 yestimar la influencia de factores pronósticos en la permeabilidad, la salvación de la extremidad y la supervivencia. Pacientesy métodos. Análisis retrospectivo de 101 procedimientos en 91 pacientes, 85/6 hombres/mujeres) con una edad media de61,54 ± 11,59 años. Factores de riesgo: diabetes, 41,6%; hipertensión, 41,6%; tabaquismo, 56,4%; cardiopatía isquémica,19,8%; insuficiencia renal, 9,9%. La indicación fue en 35,7% isquemia crítica y claudicación limitante en 61,4%. Lesión tipoTASC A: 44,6%, B: 42,6%, C: 10,9%, D: 1,98%. Técnica: angioplastia, 35,65% y stent, 64,35%. Todas las variables, métodosde evaluación clínica y hemodinámica se definieron según los criterios de la SVS/ISCVS. Resultados. A los 66 meses,las tasas de permeabilidad primaria fueron del 69,84%, secundaria del 80,64%, salvación de la extremidad del 81,5% y supervivenciadel 93,6%. Resultados precoces: 4 fracasos técnicos, éxito morfológico del 92,1% y clínico del 85,1%. No se registraronfallecimientos ni amputaciones. A los 66 meses, estratificando según TASC, las permeabilidades primarias morfológicasy clínicas, respectivamente, fueron: A: 75,09%, 63,65%; B: 68,07%, 69,66% y secundarias: A: 89,98%, 73,30%; B:81,03%, 83,14%. El factor pronóstico significativo de disminución de permeabilidad primaria fue la localización en iliacaexterna, y para tasas de salvación de extremidad y supervivencia la insuficiencia renal. Actualmente, el tratamiento endoluminaliliaco, gracias a los avances tecnológicos, los excelentes resultados y la baja morbimortalidad, puede ser la primeraalternativa terapéutica para estos pacientes. Conclusiones. El tratamiento endovascular en el sector iliaco es aplicable a estetipo de pacientes, con uso selectivo de stent, obteniendo resultados similares a otras series


Introduction. Endovascular treatment of the iliac sector, which was first applied to high-risk patients, cannow be the preferred therapeutic option today. Aim. To determine the outcomes of percutaneous transluminal angioplastyin the iliac sector, with or without stent placement, the analysis being stratified according to the TASC-2000 typesof lesion. We also sought to estimate the influence of prognostic factors on patency, limb salvage and survival. Patientsand methods. We conducted a retrospective analysis of 101 interventions in 91 patients (85/6 males/females), whosemean age was 61.54 ± 11.59 years. Risk factors: diabetes, 41.6%; hypertension, 41.6%; smoking, 56.4%; ischaemicheart disease, 19.8%; renal failure, 9.9%. The indication was critical ischaemia in 35.7% and limiting claudication in61.4%. TASC A-type lesion: 44.6%, B: 42.6%, C: 10.9%, D: 1.98%. Technique: angioplasty, 35.65% and stent, 64.35%.All the variables, methods of clinical and haemodynamic evaluation, were defined according to SVS/ISCVS criteria.Results. At 66 months, the primary patency rates were 69.84%, secondary rates were 80.64%, limb salvage was 81.5%and survival was 93.6%. Early results: there were 4 technical failures, morphological success was 92.1% and clinicalsuccess was 85.1%. No deaths or amputations were recorded. At 66 months, and stratifying according to the TASC, theprimary morphological and clinical patencies were, respectively: A: 75.09%, 63.65%; B: 68.07%, 69.66% and thesecondary ones were: A: 89.98%, 73.30%; B: 81.03%, 83.14%. The significant prognostic factor for decreased primarypatency was location in the external iliac, and for limb salvage and survival rates it was renal failure. At the presenttime, thanks to the technological advances being made, the excellent outcomes and the low morbidity and mortalityrates, endoluminal iliac treatment can be the preferred therapeutic alternative for these patients. Conclusions. Endovasculartreatment in the iliac sector is applicable in this type of patients, with selective use of stents; the resultsobtained are similar to those in other series


Assuntos
Humanos , Masculino , Feminino , Angioplastia com Balão/métodos , Arteriopatias Oclusivas/terapia , Artéria Ilíaca/patologia , Stents , Resultado do Tratamento , Análise de Sobrevida , Fatores de Risco , Prognóstico
6.
Angiología ; 60(2): 127-133, mar.-abr. 2008. ilus, tab
Artigo em Es | IBECS | ID: ibc-66235

RESUMO

Introducción. Los paragangliomas son tumores raros cuya frecuencia oscila entre 1/30.000-100.000 habitantes en la población general, siendo los del cuerpo carotídeo los más frecuentes (60%). Se estima que en el 10-50% de ellos son hereditarios, habiéndose identificado cuatro anomalías genéticas causantes. Presentamos los casos de dos hermanas con paraganglioma debido a mutación en el gen SD (11q23). Casos clínicos. Caso 1: muer de 22 años con tumoración cervical bilateral, diagnosticada con resonancia magnética de paraganglioma carotídeo bilateral (tipo III de Shamblin), más extenso en el lado izquierdo. Caso 2: su hermana de 19 años presentaba paraganglioma carotídeo izquierdo tipo I de Shamblin, diagnosticado tras tomografía computarizada por absceso periamigdalino. La historia familar muestra presencia de paragangliomas en su rama paterna, estando afectados el abuelo, el padre y cinco tíos. El estudio genético demostró una mutación del gen SD (11q23) en todos los afectados, siguiendo un patrón de herencia autosómico dominante con imprintig materno. En el primer caso se decidió tratamiento quirúrgico del paraganglioma izquierdo, requiriendo resección en bloque del tumor de la carótida interna, con interposicón de bypass carótido-carotídeo. En el segundo caso, se realizó exéresis simple del tumor, sin secuelas posquirúrgicas. Conclusiones. El paraganglioma familiar es una patología rara cuya causa genética se ha descrito. La identificación de los genes relacionados con esta entidad en los miembros de familias de alto riesgo, permitiría la detección y tratamiento precoz de estos tumores, reduciendo potencialmente la incidencia de morbimortalidad, la cual se relaciona con el tamaño y extensión del tumor


Introduction. Paragangliomas are rare tumours with an incidence ranging between 1/30.000-100.000 inhabitants in the general population, the most frequent being those affecting the carotid body (60%). Estimates suggest that 10-50% of them are hereditary, and four genetic abnormalities have been identified as causal agents. We report the cases of two sisters with paragangliomas due to a mutation in the SDHD gene (11q23). Case reports. Case 1: a22-year-old female with bilateral cervical tumours, which were diagnosed by means of magnetic resonance imaging as bilateral carotid paragangliomas (Samblin type III); the tumour was larger on the left side. Case 2: the first patient´s 19-years-old sister presented with carotid paraganglioma (Shamblin type I) on the left side; computerised tomography scanning led to a diagnosis of a peritonsillar abscess. There was a family history of paragangliomas in the paternal branch, with the grandfather, father and five uncles all being affected by such tumours. The genetic study proved the existence of a mutation in the SDHD gene (11q23) in all those affected by the condition, which followed an autosomal dominant pattern of inheritance with maternal imprinting. In the first case, surgery was chosen to treat the left paraganglioma, involving resection of the whole tumour and the internal carotid, with no post-surgical sequelae. Conclusions. Familiar paraganglioma is a rare pathology with a genetic causation that has been described. Identifying the genes linked to this condition in members of high-risk families would allow for early detection and treatment of these tumours. This would result in a reduction in the incidence of surgical morbidity and mortality, which is related to the size and extent of the tumour


Assuntos
Humanos , Feminino , Adulto , Tumor do Corpo Carotídeo/diagnóstico , Tumor do Corpo Carotídeo/genética , Tumor do Corpo Carotídeo/cirurgia , Tomografia Computadorizada por Raios X , Imageamento por Ressonância Magnética , Angiografia
7.
Angiología ; 60(1): 55-59, ene.-feb. 2008. ilus
Artigo em Es | IBECS | ID: ibc-64062

RESUMO

Introducción. Las anomalías congénitas de la vena cava inferior (VCI), como la ausencia o la hipoplasia, sondefectos poco frecuentes resultado de un probable desarrollo aberrante durante la embriogénesis. Estas anomalías parecenfavorecer la estasis venosa y el desarrollo de una trombosis venosa profunda (TVP). Caso clínico. Mujer de 27 añoscon un episodio de TVP hace 10 años, sin alteraciones en el estudio trombofílico. El estudio posterior reveló una hipoplasiadel segmento perirrenal de la VCI con una hipertrofia del sistema ácigos y hemiácigos. La paciente no ha vuelto apresentar nuevos episodios de TVP a pesar de no estar anticoagulada. Conclusiones. La ausencia de VCI es una anomalíacongénita rara, considerada un factor de riesgo importante para el desarrollo de una TVP. Debe sospecharse su existenciaen casos de TVP en personas jóvenes sin otra causa aparente, y deben realizarse pruebas de imagen (tomografíacomputarizada o resonancia magnética) para su diagnóstico. El tratamiento y el pronóstico de estos pacientes no se hanesclarecido todavía


Introduction. Congenital abnormalities of the inferior vena cava (IVC), such as absence or hypoplasia, areinfrequent defects that are probably the result of aberrant development during embryogenesis. These abnormalities seemto favour both venous stasis and the development of deep vein thrombosis (DVT). Case report. A 27-year-old female withan episode of DVT 10 years before, and no alterations in the thrombophilic study. A later study revealed hypoplasia inthe perirenal segment of the IVC with hypertrophy of the azygos and hemiazygos system. The patient has had no newepisodes of DVT despite not being on anticoagulant therapy. Conclusions. The absence of IVC is a rare congenitalanomaly, and is considered to be an important risk factor for developing DVT. Its existence should be suspected in casesof DVT in young people where there is no other apparent cause; imaging tests (computerised axial tomography ormagnetic resonance) must be performed to be able to diagnose it. The treatment and prognosis of these patients are stilllargely unknown


Assuntos
Humanos , Feminino , Adulto , Veia Cava Inferior/anormalidades , Trombose Venosa/etiologia , Trombose Venosa/diagnóstico , Angiografia por Ressonância Magnética , Trombose Venosa/tratamento farmacológico , Anticoagulantes/uso terapêutico
8.
Eur J Vasc Endovasc Surg ; 35(4): 480-6, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18077193

RESUMO

OBJECTIVES: To evaluate the relationship between C-Reactive Protein (hsCRP), a serum marker of inflammation, and endothelial dysfunction in patients with intermittent claudication. DESIGN, PATIENTS AND METHODS: Cross-sectional study with stratified sampling on dependent variables of age, genre, hypertension, hyperlipidemia, diabetes, smoking status and ankle-brachial index (ABI) to select 156 patients from a target population of 4,100 patients with claudication. We assessed the flow-mediated arterial dilation (FMAD) as a reporter of endothelial function and plasma levels of hsCRP and fibrinogen. RESULTS: Patients with a FMAD<3% (range for the lowest 5% of healthy subjects) had increased levels of plasma hsCRP (6.3 vs 2.3mg/L; p<0.05) and fibrinogen (351vs 302mg/L; p<0.05) in comparison to those with FMAD>3%. There was a negative correlation between hsCRP and FMAD(r=-0.465; p<0.05). CONCLUSION: Impaired endothelial dysfunction is association with increased plasma concentrations of inflammatory markers, and both may have a role in the aetiopathogenesis of peripheral arterial disease.


Assuntos
Artéria Braquial/fisiopatologia , Proteína C-Reativa/metabolismo , Endotélio Vascular/fisiopatologia , Claudicação Intermitente/sangue , Claudicação Intermitente/fisiopatologia , Vasodilatação/fisiologia , Idoso , Biomarcadores/sangue , Estudos Transversais , Feminino , Fibrinogênio/metabolismo , Humanos , Claudicação Intermitente/etiologia , Masculino , Pessoa de Meia-Idade , Fatores de Risco
9.
Angiología ; 59(5): 375-380, sept.-oct. 2007. tab
Artigo em Es | IBECS | ID: ibc-056508

RESUMO

Introducción y objetivo. Las guías técnicas de medición de la dilatación braquial mediada por flujo (DBMF) recomiendan su medida en diástole para evitar la influencia de la distensibilidad (complianza) arterial en los resultados. Sin embargo, no existen estudios que corroboren esta hipótesis, por lo que éste es el objetivo primordial de nuestro trabajo. Sujetos y métodos. Se reclutaron dos grupos de sujetos con estos criterios: grupo I, sujetos sanos con índice tobillo/brazo (ITB) > 0,9 y menores de 30 años, y grupo II, pacientes con arteriopatía periférica sintomática definida por un ITB < 0,9. Se les realizó la medición de la dilatación de la arteria braquial mediada por flujo (DBMF) en el brazo derecho en sístole (S) y diástole (D). Se midió en el mismo acto el ITB y se recogieron los factores de riesgo y los tratamientos. Además, se determinó la dilatación mediada por flujo en ambas arterias femorales (DFMF). Resultados. Se reclutaron 36 y 33 sujetos de los grupos I y II, respectivamente. Se compararon los valores de dilatación en S y D y se representaron como grupo: S / D (valor p). DBMF: I + II: 8,1 ± 4,6% / 7,6 ± 4,9% (p = 0,3); I: 10,8 ± 2,9% / 9,9 ± 3,8% (p = 0,055); II: 5,2 ± 4,3% / 5,16 ± 4,8% (p = 0,3). DFMF: I + II: 3,13 ± 3,6% / 2,8 ± 3,6% (p = 0,35); I: 5,3 ± 2,9% / 4,8 ± 2,6% (p = 0,02); II: 0,6 ± 2,5% / 0,6 ± 3,4% (p = 0,9). Conclusiones. Si se asume la influencia de la complianza en la dilatación arterial, se observa que la dilatación mediada por flujo en sístole es superior a la diastólica en los sujetos sanos, mientras que en los enfermos esta diferencia es prácticamente inexistente. Aunque la diferencia en la arteria braquial de sujetos sanos no llega a la significación (p = 0,055), sí que lo hace en la femoral (p = 0,02), por lo que, al valorar los datos en conjunto, recomendamos utilizar la medición en diástole para evitar sesgos a la hora de realizar comparaciones entre sanos y enfermos


Introduction and aims. The technical guides to measuring the brachial artery flow-mediated dilation (BFMD) recommend that it should be measured in the diastolic phase in order to prevent results from being influenced by arterial distensibility (compliance). No studies have been conducted, however, to confirm this hypothesis and this is therefore the main purpose of our research. Subjects and methods. Two groups of subjects were recruited on the basis of the following criteria: group I, healthy subjects with an ankle-brachial index (ABI) > 0.9 and below 30 years of age, and group II, composed of patients with symptomatic peripheral arterial disease that was defined by an ABI < 0.9. Brachial artery flow-mediated dilation was measured in the right arm in both the systolic (S) and diastolic (D) phases. The ABI was measured at the same time and the risk factors and treatments were collected. Flow-mediated dilation was also determined in both femoral arteries (FFMD). Results. Groups I and II consisted of 36 and 33 subjects respectively. The dilation values in the S and D phases were compared and represented as a group: S / D (value p). BFMD: I + II: 8.1 ± 4.6% / 7.6 ± 4.9% (p = 0.3); I: 10.8 ± 2.9% / 9.9 ± 3.8% (p = 0.055); II: 5.2 ± 4.3% / 5.16 ± 4.8% (p = 0.3). FFMD: I + II: 3.13 ± 3.6% / 2.8 ± 3.6% (p = 0.35); I: 5.3 ± 2.9% / 4.8 ± 2.6% (p = 0.02); II: 0.6 ± 2.5% / 0.6 ± 3.4% (p = 0.9). Conclusions. If it is assumed that compliance influences arterial dilation, systolic flow-mediated dilation is seen to be higher than in the diastolic phase in healthy subjects, whereas this difference is practically inexistent in patients. Although the difference in the brachial artery of healthy subjects does not reach significance (p = 0.055), it does in the femoral artery (p = 0.02). Therefore, on appraising the data as a whole, we recommend measurement in the diastolic phase in order to avoid the occurrence of biases when comparing between healthy and sick subject


Assuntos
Masculino , Pessoa de Meia-Idade , Humanos , Endotélio Vascular , Ultrassonografia/métodos , Artéria Braquial , Dilatação/métodos , Diástole/efeitos da radiação , Fatores de Risco , Angiotensinas/uso terapêutico , Inibidores da Agregação Plaquetária/uso terapêutico , Anticoagulantes/uso terapêutico , Circunferência Braquial/métodos , Endotélio , Endotélio Vascular/fisiologia , Artéria Braquial/anatomia & histologia , Artéria Braquial/fisiopatologia , Artéria Braquial/cirurgia , Dilatação/tendências , 35150 , Artéria Braquial/ultraestrutura , Sístole/fisiologia , Sístole/efeitos da radiação
10.
Angiología ; 58(supl.1): S116-S126, 2006.
Artigo em Es | IBECS | ID: ibc-046282

RESUMO

Introducción. El defecto congénito de la coartación de la aorta torácica se presenta en 1:10.000 habitantes, frecuentemente asociado a otros defectos congénitos del desarrollo cardíaco. Habitualmente se detecta y se repara en la infancia, y ocasionalmente se diagnostica en la adolescencia y la edad adulta, de novo o como complicación en la evolución de reparaciones previas (pseudoaneurismas, reestenosis, etc.). Estos pacientes requieren de intervenciones correctoras que se acompañan de una morbimortalidad significativa. La alternativa a ellas se ha desarrollado en los últimos años mediante técnicas endovasculares. Objetivo. Exponer el estado actual de la práctica clínica en el tratamiento endovascular de la coartación de la aorta torácica mediante angioplastia simple y angioplastia con stent. Desarrollo. Se discute la indicación de angioplastia en los niños menores de 3 años. La utilización de stents está limitada en la edad infantil por el desarrollo incompleto del niño. Puede ser el tratamiento de elección en el adolescente y el adulto, incluso mediante stent primario. Conclusión. Las reintervenciones con técnica endovascular de las reestenosis y las endoprótesis cubiertas para el tratamiento de los aneurismas poscoartación y de los pseudoaneurismas poscirugía ofrecen resultados satisfactorios


Introduction. Coarctation of the thoracic aorta presents as a connatal defect in 1:10,000 inhabitants, and is frequently associated to other congenital anomalies affecting the development of the heart. It is usually detected and repaired in infancy, but may be diagnosed during adolescence and in adulthood, either de novo or as a complication in the progress of previous repairs (pseudoaneurysms, restenosis, etc.). These patients require remedial interventions that are accompanied by a significant morbidity and mortality rate. An alternative to such procedures has been developed in recent years using endovascular techniques. Aim. To report the current state of the art of clinical practice in the endovascular treatment of coarctation of the thoracic aorta by means of simple stent angioplasty. Development. The indication for angioplasty in children under 3 years of age is discussed. The use of stents is limited in childhood because the child’s development is still incomplete. It can be the preferred treatment in adolescents and adults, even with the use of a primary stent. Conclusions. Reinterventions with endovascular techniques to treat restenosis and covered stents for the treatment of post-coarctation aneurysms and post-surgery pseudoaneurysms offer satisfactory results


Assuntos
Coartação Aórtica/diagnóstico , Coartação Aórtica/cirurgia , Angioplastia/métodos , Fístula Carotidocavernosa/diagnóstico , Fístula Carotidocavernosa/terapia , Oclusão de Enxerto Vascular/complicações , Oclusão de Enxerto Vascular/diagnóstico , Reestenose Coronária/terapia , Cateterismo/métodos , Análise Custo-Benefício/métodos , Coartação Aórtica/patologia , Cateterismo/tendências , Cateterismo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...