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2.
J Vasc Interv Radiol ; 27(2): 181-7, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26686422

RESUMO

PURPOSE: To study long-term changes to the thoracic aorta following thoracic endovascular aortic repair (TEVAR) for treatment of different aortic pathologic conditions. MATERIALS AND METHODS: This retrospective study included 53 consecutive patients (mean age, 58.8 y ± 14; 13 female and 40 male) in whom TEVAR was performed between October 2002 and May 2010. The mean duration of follow-up was 21.1 months (range, 0.5-96 mo). Statistical analysis was performed with the Friedman test and Conover-Iman test. RESULTS: Nineteen patients with aortic aneurysm (group 1), 25 patients with type B dissection (group 2), and 9 patients with other pathologic conditions (group 3) were treated with TEVAR. The mean overall aortic lengths (from the origin of the left subclavian artery to the origin of the celiac trunk) before TEVAR were 271.4 mm, 268.6 mm, and 233.6 mm in groups 1, 2, and 3, respectively. At 12-month follow-up, the lengths were 282.8 mm, 294.4 mm, and 237.5 mm in groups 1, 2, and 3, respectively. The changes in aortic lengths following TEVAR were statistically significant (P < .001). A second intervention was required in 14 patients, and 6 patients died during follow-up. CONCLUSIONS: A significant change in the overall aortic length was observed following TEVAR. The changes in aortic length reached statistical significance after 12 months.


Assuntos
Aorta Torácica/fisiopatologia , Aorta Torácica/cirurgia , Doenças da Aorta/fisiopatologia , Doenças da Aorta/cirurgia , Procedimentos Endovasculares/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
3.
J Endovasc Ther ; 21(4): 463-71, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25101571

RESUMO

PURPOSE: To investigate nitinol stent treatment of superficial femoral artery (SFA) lesions and the impact of different risk factors on the need for clinically driven target lesion revascularization (TLR) in a large, real-world population of claudicants. METHODS: Patients presenting with symptomatic SFA stenosis >70% were consecutively enrolled in the 13-center MARIS prospective registry (ClinicalTrials.gov identifier NCT01067885). There was no restriction on lesion length, thus leading to the inclusion of a real-world as well as high-risk patient cohort. The 998 participating patients (657 men; mean age 67.4±9.2 years) had 1050 lesions treated with the same nitinol stent type. The mean lesion length was 9.5±9.6 cm (range 0.5-44; median 8.0); more than a third of the lesions (450, 42.9%) were total occlusions. The primary endpoint was the need for clinically driven target lesion revascularization (TLR) at 12 months. RESULTS: Acute technical success was achieved in 1042 (99.2%) lesions. Restenosis occurred in 187 (23.7%) and reocclusion in 79 (10.0%) lesions at 12 months. The primary endpoint of TLR at 12 months was reached by 136 (17.2%) patients. The periprocedural complication rate was 5.4%. Independent predictors of TLR were female gender [odds ratio (OR) 0.5, 95% confidence interval (CI) 0.3 to 0.7, p<0.001] and lesion length >20 cm vs. 10 cm (OR 2.7, 95% CI 1.1 to 6.6, p=0.029) and 10-20 cm vs. 10 cm (OR 1.9, 95% CI 1.0 to 4.1, p=0.047). CONCLUSION: Stent implantation in the SFA is safe and associated with favorable acute and midterm results in a real-world setting. Lesion length and female gender were identified as independent risk factors for TLR.


Assuntos
Angioplastia com Balão/instrumentação , Artéria Femoral , Claudicação Intermitente/terapia , Isquemia/terapia , Doença Arterial Periférica/terapia , Stents , Idoso , Ligas , Angioplastia com Balão/efeitos adversos , Constrição Patológica , Feminino , Alemanha , Humanos , Claudicação Intermitente/diagnóstico , Isquemia/diagnóstico , Estimativa de Kaplan-Meier , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Razão de Chances , Doença Arterial Periférica/diagnóstico , Estudos Prospectivos , Desenho de Prótese , Recidiva , Sistema de Registros , Fatores de Risco , Fatores Sexuais , Fatores de Tempo , Resultado do Tratamento
5.
Circ Arrhythm Electrophysiol ; 6(5): 835-42, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23983245

RESUMO

BACKGROUND: This prospective, multicenter study sought to evaluate the incidence of asymptomatic cerebral emboli (ACE) during ablation of atrial fibrillation (AF) using a multielectrode radiofrequency (MER) system when specific procedural changes were applied. METHODS AND RESULTS: Sixty subjects (age 60±10 years; 87% paroxysmal; CHADS2 score, 0.6±0.7) undergoing AF ablation with a circular MER catheter were studied. Three procedural changes were specified: (1) ablation was performed under therapeutic vitamin K antagonist and heparin to maintain activated clotting time>350 seconds; (2) submerged loading of the catheter into the introducer before sheath insertion to minimize air ingress; and (3) either the distal or proximal electrode of the circular MER catheter was deactivated to prevent inadvertent bipolar radiofrequency interaction. MRI was performed <7 days preablation and 2 days postablation. Subjects with new cerebral findings after ablation underwent repeat MRI after 1 month. An acute ACE lesion was defined by a new hyperintensity on diffusion-weighted and fluid-attenuated inversion recovery cerebral MRI sequences. Neurological function was evaluated at baseline, postablation, and 1 month. All target pulmonary veins were isolated. In 60% (36/60) of patients, pre-existing cerebral lesions were seen on the preprocedure MRI (8 lesions per subject; interquartile range, 3-22). New postprocedural ACE occurred in only 1/60 patients (incidence, 1.7%; 95% confidence interval, 0.04-8.9), which was no longer visible on MRI after 1 month. CONCLUSIONS: Applying procedural changes to MER ablation significantly reduces the ACE incidence to 1.7%, which is on the low end of reported ACE rates of any technology. CLINICAL TRIAL REGISTRATION INFORMATION: ClinicalTrials.gov; Identifier: NCT01520532.


Assuntos
Fibrilação Atrial/complicações , Fibrilação Atrial/cirurgia , Ablação por Cateter/efeitos adversos , Infarto Cerebral/epidemiologia , Embolia Intracraniana/etiologia , Doença Crônica , Feminino , Humanos , Incidência , Embolia Intracraniana/epidemiologia , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Prevalência , Estudos Prospectivos
6.
Angiology ; 62(8): 645-56, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21555314

RESUMO

The present study was carried out to provide information about outcome of the Jetstream atherectomy device for treatment of infrainguinal arteries. From February 2006 to February 2007, 172 patients with Rutherford class 1 to 5 lower limb ischemia were enrolled at 9 study sites. The endpoints were evaluation of quality of life according to the walking impairment questionnaire (WIQ) besides technical parameters. In the total study cohort, the WIQ scale maintained improved up to 12-month follow-up. Furthermore, target lesion revascularization rate was 26% (42/162), ankle-brachial index (ABI) increased from 0.59 ± 0.21 at baseline to 0.82 ± 0.27 (P < 0.05), and mean Rutherford class dropped from 3.0 ± 0.9 at baseline to 1.5 ± 1.3 at 1 year (P < .05). The results of this prospective, multicenter, clinical study demonstrate that the Jetstream atherectomy device is a potential treatment alternative for the endovascular management to improve clinical outcome in patients with peripheral arterial occlusive disease.


Assuntos
Arteriopatias Oclusivas/cirurgia , Aterectomia/métodos , Artéria Femoral/cirurgia , Artéria Poplítea/cirurgia , Idoso , Idoso de 80 Anos ou mais , Índice Tornozelo-Braço , Arteriopatias Oclusivas/diagnóstico por imagem , Arteriopatias Oclusivas/fisiopatologia , Velocidade do Fluxo Sanguíneo , Feminino , Artéria Femoral/diagnóstico por imagem , Artéria Femoral/fisiopatologia , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Artéria Poplítea/diagnóstico por imagem , Artéria Poplítea/fisiopatologia , Estudos Retrospectivos , Fatores de Tempo , Resultado do Tratamento , Ultrassonografia Doppler Dupla
7.
Ann Vasc Surg ; 25(4): 520-9, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21549922

RESUMO

BACKGROUND: To compare the safety and efficacy of a rotational aspiration atherectomy system (Jetstream) for the treatment of infrainguinal arteries in diabetic versus nondiabetic patients. METHODS: A total of 172 patients with Rutherford stage 1-5 lower limb ischemia were treated with rotational aspiration atherectomy between February 2006 and February 2007. Of these, 80 patients with type 2 diabetes mellitus (DM: 46.5%) were compared with 92 nonDM (53.5%) patients. Overall, 210 target lesions (99 DM; 111 nonDM) were treated, located in the superficial femoral (67% DM; 61% nonDM), popliteal (25% DM; 30% nonDM), and tibial (8% DM; 9% nonDM) arteries. Lesion characteristics were comparable in both groups, mean lesion length was 28.5 mm (DM) and 26.2 mm (nonDM); total occlusions were present in 29% (DM) and 32% (nonDM), and 15% (DM) and 14% (nonDM) were restenotic. RESULTS: In the entire cohort, device success was 99% (all but two lesions). The major adverse event (MAE) rate (death, index limb amputation, myocardial infarction, target lesion revascularization [TLR] and target vessel revascularization) in DM at 30 days was 2.5% (n = 2 planned amputations) and 0% in nonDM. At 6 and 12 months, MAE in DM was seen in 13.8% (11/80) and 25% (20/80) compared with 21.7% (20/92) and 31.5% (29/92) in nonDM, respectively. TLR rate through 12 months was 20% (16/80) in DM and 28% in nonDM (26/92). Overall, 1 year restenosis rate was 38.2% based on duplex. The ankle-brachial index, mean Rutherford categories, and walking impairment questionnaire did not differ between groups at baseline and were increased significantly in both study cohorts at 12 months. CONCLUSION: Jetstream-assisted atherectomy in infrainguinal arteries is safe and effective in DM compared with nonDM patients. In this short-lesion cohort, vessel patency in diabetics was as good as for non-DM at 1 year. TLR and MAE were higher by trend in nonDM, although planned amputations were seen only in DM. The clinical benefit was similar in both groups.


Assuntos
Aterectomia/métodos , Diabetes Mellitus Tipo 2/complicações , Isquemia/terapia , Extremidade Inferior/irrigação sanguínea , Doença Arterial Periférica/terapia , Idoso , Idoso de 80 Anos ou mais , Amputação Cirúrgica , Índice Tornozelo-Braço , Aterectomia/efeitos adversos , Europa (Continente) , Feminino , Humanos , Isquemia/diagnóstico , Isquemia/etiologia , Isquemia/fisiopatologia , Salvamento de Membro , Masculino , Pessoa de Meia-Idade , Doença Arterial Periférica/complicações , Doença Arterial Periférica/diagnóstico , Doença Arterial Periférica/fisiopatologia , Estudos Prospectivos , Inquéritos e Questionários , Fatores de Tempo , Resultado do Tratamento , Ultrassonografia Doppler Dupla , Grau de Desobstrução Vascular
8.
Circ Cardiovasc Interv ; 4(1): 26-37, 2011 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-21205939

RESUMO

BACKGROUND: Critical limb ischemia due to peripheral arterial occlusive disease is associated with a severely increased morbidity and mortality. There is no effective pharmacological therapy available. Injection of autologous bone marrow-derived mononuclear cells (BM-MNC) is a promising therapeutic option in patients with critical limb ischemia, but double-blind, randomized trials are lacking. METHODS AND RESULTS: Forty patients with critical limb ischemia were included in a multicenter, phase II, double-blind, randomized-start trial to receive either intraarterial administration of BM-MNC or placebo followed by active treatment with BM-MNC (open label) after 3 months. Intraarterial administration of BM-MNC did not significantly increase ankle-brachial index and, thus, the trial missed its primary end point. However, cell therapy was associated with significantly improved ulcer healing (ulcer area, 3.2±4.7 cm(2) to 1.89±3.5 cm(2) [P=0.014] versus placebo, 2.92±3.5 cm(2) to 2.89±4.1 cm(2) [P=0.5]) and reduced rest pain (5.2±1.8 to 2.2±1.3 [P=0.009] versus placebo, 4.5±2.4 to 3.9±2.6 [P=0.3]) within 3 months. Limb salvage and amputation-free survival rates did not differ between the groups. Repeated BM-MNC administration and higher BM-MNC numbers and functionality were the only independent predictors of improved ulcer healing. Ulcer healing induced by repeated BM-MNC administration significantly correlated with limb salvage (r=0.8; P<0.001). CONCLUSIONS: Intraarterial administration of BM-MNC is safe and feasible and accelerates wound healing in patients without extensive gangrene and impending amputation. These exploratory findings of this pilot trial need to be confirmed in a larger randomized trial in patients with critical limb ischemia and stable ulcers.


Assuntos
Isquemia/cirurgia , Extremidade Inferior/irrigação sanguínea , Doença Arterial Periférica/cirurgia , Transplante de Células-Tronco , Idoso , Método Duplo-Cego , Feminino , Humanos , Injeções Intra-Arteriais , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Células-Tronco , Resultado do Tratamento
9.
Eur J Radiol ; 75(1): 48-56, 2010 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20451340

RESUMO

PURPOSE: Evaluation of percutaneous recanalization of obstructed iliac as well as superficial femoral arteries (SFAs) in patients with peripheral arterial obstructive disease (PAOD). MATERIAL AND METHODS: The data of 195 consecutive patients with 285 obstructions of the common and or external iliac artery as well as the data of 452 consecutive patients with 602 long occlusions (length>5 cm) of the SFA were retrospectively analyzed. The lesions were either treated with percutaneous transluminal angioplasty (PTA) or Excimer laser assisted percutaneous transluminal angioplasty (LPTA). Overall 316 stents were implanted (Nitinol stents: 136; stainless steel stents: 180) in the iliac artery and 669 stents were implanted (Nitinol stents: 311; Easy Wallstents: 358) in the SFA. The follow-up period was 36-65 months (mean 46.98+/-7.11 months) postinterventionally using clinical examination, ABI calculation, and color-coded duplex sonography. Patency rates were calculated on the basis of the Kaplan-Meier analysis. RESULTS: The overall primary technical success rate was 97.89% for the iliac arteries and 92.35% for the SFA. Minor complications (hematoma, distal emboli and vessel dissection) were documented in 11.79% for the iliac arteries and 7.97% for the SFA. The primary patency rate was 90.3% for the iliac and 52.8% for the SFA after 4 years. The secondary patency rate was 96.84% for the iliac and 77.8% for the SFA after 4 years. CONCLUSION: Percutaneous recanalization of iliac and superficial femoral artery obstructions is a safe and effective technique for the treatment of patients with PAOD. By consequent clinical monitoring high secondary patency rates can be achieved. The use of a stents seems to result in higher patency rate especially in the SFA when compared to the literature in long-term follow-up.


Assuntos
Angioplastia com Balão/estatística & dados numéricos , Artéria Femoral/cirurgia , Pelve/irrigação sanguínea , Pelve/cirurgia , Doenças Vasculares Periféricas/epidemiologia , Doenças Vasculares Periféricas/cirurgia , Sistema de Registros/estatística & dados numéricos , Angioplastia com Balão/instrumentação , Feminino , Alemanha/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
10.
Eur J Radiol ; 75(1): 37-42, 2010 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20462719

RESUMO

PURPOSE: Evaluation of angioplasty with bare metal stents in infrapopliteal occlusions or severe stenoses in patients with critical limb ischemia. MATERIAL AND METHODS: Percutaneous stent angioplasty was performed in 58 limbs in 47 patients with critical limb ischemia (CLI) in Rutherford stage 4-6. Lesions with up to 5 cm in length with at least one patent vessel below the obstruction were treated. 121 bare metal stents (diameter of 2.5-4 mm; length of 18-38 mm) were implanted. Follow-up examinations were performed up to 12 months postinterventionally using clinical examination, ABI calculation, and color-coded duplex sonography. Patency rates were calculated on the basis of the Kaplan-Meier analysis. RESULTS: Technical success was achieved in 100%. Minor complications (hematoma, distal emboli, vessel dissection) were documented in 5.17% (n=3) limbs, respectively. The 3-month, 6-month, and 1-year primary patency rate was 93.0%, 78.9% and 66.7%, respectively. 86.9% of the lesions healed postinterventionally. The cumulative limb salvage rate was 96.6%. CONCLUSION: Stent angioplasty in infrapopliteal arteries is a safe and effective technique for the treatment of patients with CLI. By consequent clinical monitoring high secondary patency rates can be achieved. The use of a bare metal stent seems to result in high limb salvage, primary and secondary patency rates in the mid-term follow-up.


Assuntos
Angioplastia com Balão/métodos , Isquemia/cirurgia , Joelho/irrigação sanguínea , Joelho/cirurgia , Perna (Membro)/irrigação sanguínea , Perna (Membro)/cirurgia , Stents , Adulto , Idoso , Idoso de 80 Anos ou mais , Angioplastia com Balão/instrumentação , Prótese Vascular , Feminino , Humanos , Isquemia/diagnóstico por imagem , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento , Ultrassonografia
11.
J Endovasc Ther ; 16(6): 653-62, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19995118

RESUMO

PURPOSE: To report a safety and efficacy study of a novel rotational atherectomy system with aspiration capabilities for the treatment of infrainguinal arterial lesions. METHODS: From February 2006 to January 2007, 172 patients (88 women; mean age 72 years, range 51-93; 47% diabetics) with Rutherford class 1-5 lower limb ischemia were enrolled at 9 study sites. Inclusion criteria were atherosclerotic stenoses >70% and up to 10 cm long in the femoropopliteal segment or up to 3 cm long in the infrapopliteal vessels (reference vessel diameter 3.0-5.0 mm). In the study, 210 lesions (mean length 2.7 cm) were treated with the Pathway PV System, including total occlusions (31%), lesions with a moderate to high calcium score (51%), and post-angioplasty (non-stent) restenotic lesions (15%). The primary study endpoint was the 30-day major adverse event (MAE) rate. RESULTS: Device success was 99% (208/210 lesions). MAE at 30 days was 1% (2 preplanned amputations). Clinically driven target lesion revascularization rates at 6 and 12 months were 15% (25/172) and 26% (42/162), respectively. The 1-year restenosis rate was 38.2% based on duplex imaging. The ankle-brachial index increased significantly from 0.59+/-0.21 at baseline to 0.82+/-0.27 (p<0.05) at 12 months. Mean Rutherford class improved from 3.0+/-0.9 at baseline to 1.5+/-1.3 at 1 year (p<0.05). CONCLUSION: The use of the Pathway PV System in atherosclerotic lesions appears to be safe and effective in improving stenosis severity, even in the presence of challenging lesion conditions. Vessel patency following intervention appears to be good up to 12 months, and these results translate into clinical benefit.


Assuntos
Arteriopatias Oclusivas/terapia , Aterectomia/métodos , Extremidade Inferior/irrigação sanguínea , Doenças Vasculares Periféricas/terapia , Sucção , Idoso , Idoso de 80 Anos ou mais , Amputação Cirúrgica , Angioplastia com Balão , Tornozelo/irrigação sanguínea , Arteriopatias Oclusivas/diagnóstico , Arteriopatias Oclusivas/fisiopatologia , Aterectomia/efeitos adversos , Aterectomia/instrumentação , Pressão Sanguínea , Artéria Braquial/fisiopatologia , Constrição Patológica , Desenho de Equipamento , Europa (Continente) , Feminino , Humanos , Salvamento de Membro , Masculino , Pessoa de Meia-Idade , Doenças Vasculares Periféricas/diagnóstico , Doenças Vasculares Periféricas/fisiopatologia , Estudos Prospectivos , Recidiva , Índice de Gravidade de Doença , Sucção/efeitos adversos , Sucção/instrumentação , Fatores de Tempo , Resultado do Tratamento , Ultrassonografia Doppler Dupla
12.
Radiology ; 250(1): 281-9, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-19092099

RESUMO

PURPOSE: To evaluate local tumor control and survival data after transarterial chemoembolization with different drug combinations in the palliative treatment of liver metastases in patients with colorectal cancer. MATERIALS AND METHODS: The study was approved by institutional review board, and informed consent was obtained from all patients included in the study. A total of 463 patients (mean age, 62.5 years; range, 34.7-88.1 years) with unresectable liver metastases of colorectal cancer that did not respond to systemic chemotherapy were repeatedly treated with chemoembolization in 4-week intervals. In total, 2441 chemoembolization procedures were performed (mean, 5.3 sessions per patient). Of 463 patients, 67.4% had multiple (five or more) metastases, 8% had one metastasis, 10.4% had two metastases, and 14.3% had three or four metastases. The local chemotherapy protocol consisted of mitomycin C alone (n = 243), mitomycin C with gemcitabine (n = 153), or mitomycin C with irinotecan (n = 67). Embolization was performed with lipiodol and starch microspheres for vessel occlusion. Tumor response was evaluated with magnetic resonance imaging. The change in tumor size was calculated and the response was evaluated according to the Response Evaluation Criteria in Solid Tumors. Survival rates from first diagnosis and from first chemoembolization session were calculated according to the Kaplan-Meier method. Follow-up imaging was performed until patient death. RESULTS: Evaluation of local tumor control resulted in partial response (68 patients [14.7%]), stable disease (223 patients [48.2%]), and progressive disease (172 patients [37.1%]). The 1-year survival rate after chemoembolization was 62%, and the 2-year survival rate was 28%. Median survival from date of diagnosis of liver metastases was 38 months and from the start of chemoembolization treatment was 14 months. There was no statistically significant difference between the three treatment protocols. CONCLUSION: Chemoembolization is a minimally invasive therapy option for palliative treatment of liver metastases in patients with colorectal cancer, with similar results among three chemoembolization protocols.


Assuntos
Quimioembolização Terapêutica/métodos , Neoplasias Colorretais/terapia , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/secundário , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Camptotecina/administração & dosagem , Camptotecina/análogos & derivados , Neoplasias Colorretais/diagnóstico , Neoplasias Colorretais/mortalidade , Desoxicitidina/administração & dosagem , Desoxicitidina/análogos & derivados , Progressão da Doença , Feminino , Humanos , Infusões Intra-Arteriais , Irinotecano , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/mortalidade , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Mitomicina/administração & dosagem , Cuidados Paliativos , Estudos Prospectivos , Taxa de Sobrevida , Tomografia Computadorizada Espiral , Gencitabina
13.
Eur J Vasc Endovasc Surg ; 36(2): 138-144, 2008 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-18579419

RESUMO

Carotid angioplasty with stenting (CAS) is increasingly being used in the treatment of extracranial carotid disease and numerous studies have demonstrated its feasibility. However, the exact role of CAS in the treatment of carotid stenosis and its long-term efficacy has not been defined. The assessment of the patient's medical condition, the exact identification of vessel anatomy as well as anomalies of the aortic arch and the cervicocerebral circulation is required for successful and safe performance of CAS. New CAS practitioners would be advised to start their experience in patients with predominantly easier anatomical situation as well as plaque configuration. The appropriate selection of interventional techniques as well as vascular access for CAS is dependent on the anatomy of the aortic arch and of the CCA proximal to the target lesion. Usually a retrograde femoral artery approach to access the CCA is preferred. In order to treat a patient safely with carotid artery stenting, it essential for interventionalists to appropriately chose a patient suited for endovascular therapy, to identify possible sources of complications prior to the interventional procedure as well as to know the key points for a successful carotid artery intervention. An interdisciplinary evidence-based approach will facilitate the choice of optimal intervention for each patient. Finally, trainee programs for physicians starting with CAS as well as facility certification are absolutely mandatory to ensure high success rates as well as low complication rates.


Assuntos
Angioplastia com Balão/instrumentação , Artéria Carótida Primitiva , Estenose das Carótidas/terapia , Seleção de Pacientes , Stents , Angioplastia com Balão/efeitos adversos , Angioplastia com Balão/educação , Angioplastia com Balão/história , Aorta Torácica/diagnóstico por imagem , Artéria Carótida Primitiva/diagnóstico por imagem , Artéria Carótida Primitiva/cirurgia , Estenose das Carótidas/diagnóstico por imagem , Estenose das Carótidas/cirurgia , Competência Clínica , Educação de Pós-Graduação em Medicina , Endarterectomia das Carótidas/efeitos adversos , História do Século XX , História do Século XXI , Humanos , Guias de Prática Clínica como Assunto , Desenho de Prótese , Radiografia , Medição de Risco , Resultado do Tratamento
14.
Eur Arch Otorhinolaryngol ; 264(10): 1207-13, 2007 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-17479272

RESUMO

Primary non-Hodgkin lymphoma (NHL) of the paranasal sinuses is a rare neoplasm that cannot be easily diagnosed and differentiated as its clinical, histological, and imaging features are similar to those of other inflammatory and tumorous diseases in their early stages. We evaluated the morphological and functional imaging characteristics of primary NHL of the sphenoid sinus using CT and MR imaging. Morphological CT and MR imaging as well as perfusion CT imaging and proton MR spectroscopy (PRESS technique, TE = 135) was performed in three patients with the histological diagnosis of highly malignant primary B cell lymphoma of the sphenoid sinus. In all patients an inhomogeneous contrast agent enhancement as well as bony erosion of the sphenoid sinus was identified in CT and MR sections. In one patient an infiltration of the adjacent dura was present. The mean blood flow of the lymphomas was 135 ml/min per 100 g tissue, the mean blood volume was 8.06 ml/min, while the mean transit time and the mean permeability surface area product values were 5.11 s and 26.53 ml/min per 100 g, respectively. The mean choline to creatine ratio in the proton MR spectroscopy was 5.7. Cross-sectional imaging findings are not sufficient to establish the diagnosis of a primary NHL in the sphenoid sinus. Physiologic imaging offers valuable information that may be characteristic of the tumor. Future studies may lead to a safe differentiation of the lymphomas from other pathologic entities based on the combination of morphological and functional imaging.


Assuntos
Linfoma de Células B/diagnóstico por imagem , Linfoma de Células B/patologia , Imageamento por Ressonância Magnética , Neoplasias dos Seios Paranasais/diagnóstico por imagem , Neoplasias dos Seios Paranasais/patologia , Seio Esfenoidal/diagnóstico por imagem , Seio Esfenoidal/patologia , Tomografia Computadorizada por Raios X , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Linfoma de Células B/diagnóstico , Espectroscopia de Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Neoplasias dos Seios Paranasais/diagnóstico
15.
Eur Radiol ; 17(2): 553-63, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16896704

RESUMO

This study aims to evaluate the efficacy and safety of a neoadjuvant treatment protocol with repeated transarterial chemoembolization (TACE) before MR-guided laser-induced thermotherapy (LITT) for large-sized hepatocellular carcinomas (HCC). Repeated TACE (mean, 3.5 treatments per patient) was performed in 48 patients with neoadjuvant intention (the largest lesion was between 50 and 80 mm in diameter, and there were no more than five lesions). For the TACE treatment, we used 10 mg/m(2) mitomycin, 10 ml/m(2) Lipiodol and microspheres. The tumor volume was measured by MRI. Lipiodol retention of the tumors was evaluated with CT. After the diameter of the tumors had decreased to less than 50 mm, the patients were treated with MR-guided LITT 4 to 6 weeks after embolization. Repeated TACE reduced the tumor size in 32 patients (66.7%), forming the basis for performing MR-guided LITT procedures. These patients received one to four laser treatments (mean, 1.9 per patient) for tumor ablation, resulting in a median survival of 36.0 months after the first treatment. For the remaining patients, no reduction in tumor size was achieved in 12 patients and disease progression in 4 patients. Neoadjuvant TACE appears to be an effective treatment of large-sized HCC, which extends the indication for MR-guided LITT.


Assuntos
Carcinoma Hepatocelular/terapia , Quimioembolização Terapêutica , Hipertermia Induzida , Lasers , Neoplasias Hepáticas/terapia , Imageamento por Ressonância Magnética , Terapia Neoadjuvante , Idoso , Idoso de 80 Anos ou mais , Angiografia Digital , Antibióticos Antineoplásicos/administração & dosagem , Carcinoma Hepatocelular/diagnóstico por imagem , Carcinoma Hepatocelular/patologia , Ablação por Cateter , Quimioembolização Terapêutica/efeitos adversos , Quimioembolização Terapêutica/métodos , Meios de Contraste , Imagem Ecoplanar , Feminino , Seguimentos , Humanos , Hipertermia Induzida/efeitos adversos , Hipertermia Induzida/métodos , Óleo Iodado , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/patologia , Imageamento por Ressonância Magnética/métodos , Masculino , Microesferas , Pessoa de Meia-Idade , Mitomicina/administração & dosagem , Análise de Sobrevida , Fatores de Tempo , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Carga Tumoral/efeitos dos fármacos
16.
Eur Radiol ; 16(3): 670-5, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16132920

RESUMO

The purpose of this study was to evaluate the potential of transarterial embolization (TAE) for the treatment of focal nodular hyperplasia (FNH). Four women with the diagnosis of FNH underwent superselective transarterial embolization with contour particles between 2001 and 2004. The indications were progressive increase in size in three of the patients and abdominal pain in the fourth patient. No immediate or delayed postembolization complications were encountered in any of our patients. All patients presented angiographically with characteristic findings, such as feeding artery, a tumor blush, and septations. In two patients, the embolization resulted in a constant size or volume decrease in the 1-year follow-up. In the other two patients, a complete resolution of the FNH was observed in the MRI follow-up after 1 year. This group presented with a homogeneous devascularization in the immediate postembolization exam. In conclusion, transarterial embolization of focal nodular hyperplasia can be considered as a possible alternative treatment method to surgery.


Assuntos
Embolização Terapêutica/métodos , Hiperplasia Nodular Focal do Fígado/terapia , Adulto , Meios de Contraste , Feminino , Gadolínio DTPA , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Tamanho da Partícula
17.
Eur Radiol ; 16(1): 124-31, 2006 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-15809828

RESUMO

We report the primary and long-term outcome of patients with selected TransAtlantic Inter-Society Consensus (TASC) C or D lesions of the iliac arteries after percutaneous interventional reconstruction. Between 1999 and 2001, 89 patients with peripheral arterial disease categorized as TASC C (n=37) and D (n=52) underwent percutaneous interventional reconstruction and stent implantation. Patients were followed for 1-62 months (mean 36 months). Patency rates were assessed by Duplex ultrasound and ankle-brachial index (ABI) measurement. The primary technical success rate was 96.9% with an overall complication rate of 5.6%. The ABI improved from an average of 0.51+/-0.15 before intervention to 0.79+/-0.16 on the day following intervention and to 0.81+/-0.17 within 3 years after intervention. Clinical improvement was observed in 97.3% of the patients in the TASC C group and in 88.5% in the TASC D group. Eighty of 89 patients (89.9%) remained patent at 3-year follow-up. In five patients the reintervention was successful. The secondary patency rate was 95.5%. The patency rates were similar in our selected TASC C and D patients to those so far published for TASC A and B, with low complication rates. Therefore, percutaneous intervention can be recommended for these patients.


Assuntos
Angioplastia com Balão/métodos , Angioplastia com Balão/estatística & dados numéricos , Arteriopatias Oclusivas/terapia , Implante de Prótese Vascular/métodos , Implante de Prótese Vascular/estatística & dados numéricos , Artéria Ilíaca/cirurgia , Tornozelo/irrigação sanguínea , Arteriopatias Oclusivas/classificação , Arteriopatias Oclusivas/cirurgia , Artéria Braquial/fisiologia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Pelve/irrigação sanguínea , Estudos Retrospectivos , Stents , Resultado do Tratamento , Ultrassonografia Doppler Dupla/métodos , Grau de Desobstrução Vascular/fisiologia
18.
Eur Radiol ; 16(2): 381-90, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-15830197

RESUMO

We report the primary and mid-term outcome of patients with long chronic iliac artery occlusions after percutaneous excimer-laser-assisted interventional recanalization. Between 2000 and 2001, 43 patients with 46 chronic occlusions of either the common iliac artery (n=27), the external iliac artery ( n=13) or both (n=3) underwent laser-assisted percutaneous transluminal angioplasty and implantation of stents. The average length of the occlusion was 57.1+/-26 mm. After laser-assisted angioplasty and implantation of a total of 60 stents, the patients were followed up for up to 4 years. Patency rates were analyzed by ankle-brachial index (ABI) measurement and duplex ultrasound. The primary technical success rate was 95.3%, with a major complication rate of 6.9%. Clinical improvement as categorized by the Rutherford guidelines could be observed in 97.6% of cases. The ABI of all patients improved from an average of 0.46+/-0.08 before intervention to 0.97+/-0.13 at the end of the follow-up period. The overall primary patency rate was 86.1%. Four reinterventions were successful (secondary patency rate 95.4%). The mid-term results of the percutaneous recanalization of iliac artery occlusions with primary and secondary patency rates of 86.1 and 95.4% are similar to those of the treatment of short stenoses.


Assuntos
Angiografia , Angioplastia a Laser , Arteriopatias Oclusivas/cirurgia , Artéria Ilíaca/cirurgia , Stents , Adulto , Idoso , Idoso de 80 Anos ou mais , Arteriopatias Oclusivas/diagnóstico por imagem , Doença Crônica , Feminino , Seguimentos , Humanos , Artéria Ilíaca/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Reoperação , Grau de Desobstrução Vascular/fisiologia
19.
EuroIntervention ; 1(3): 296-304, 2005 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19758920

RESUMO

AIM: To evaluate whether contrast enhanced MRA (CE-MRA), including a dedicated MRA coil and a high dose of contrast material, correlates to i.a. digital subtraction angiography (DSA) when used for treatment planning in patients with peripheral arterial obstructive disease (PAOD). METHODS AND RESULTS: A retrospective CE-MRA and i.a. DSA comparison was used to evaluate 2200 vessel segments with stenosis or occlusion in the pelvic or lower extremity arteries in 100 patients. A 1.5T MR unit (Magnetom Symphony Quantum, Siemens) employing a peripheral angiography array surface coil and automatic table movement was used. The interventional approach was planned according to both CE-MRA and DSA findings. Visual material was blinded and reviewed by two experienced radiologists.In 98.95% (Observer 1) and 98.1% (Observer 2) CE-MRA revealed an exact correlation of the grade as well as length of stenosis compared to DSA. The sensitivity was 100% and 95.3% for observers 1 and 2 and its specificity 98.3% and 100%, respectively. The interobserver agreement between was 0.98 and 0.96 for observers 1 and 2, respectively. Suggested treatment and interventional approach based on the CE-MRA findings corresponded to DSA in 97%. CONCLUSION: CE-MRA is an excellent modality for treatment planning in patients with PAOD. Especially in patients with restenosis or reocclusion, CE-MRA enables an accurate, non-invasive diagnosis and facilitates treatment planning.

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