Análise do strain por ressonância magnética em cardiomiopatia siderótica antes e após terapia de quelação de ferro / Magnetic resonance strain analysis in siderotic cardiomyopathy before and after iron chelation therapy

INTRODUÇÃO: Hemocromatose juvenil é uma condição rara de sobrecarga de ferro que causa cardiomiopatia. O distúrbio do metabolismo do ferro que induz à insuficiência cardíaca ainda não é totalmente compreendido, mas a disfunção miocárdica parece ser intimamente relacionada à deposição de ferro nos miócitos. A ressonância magnética cardíaca (RMC) é o método padrão para detecção de ferro nos tecidos. OBJETIVO: Avaliar o strain global circunferencial pela ressonância magnética cardíaca (SGC-RM) em um grupo de pacientes com hemocromatose juvenil e cardiomiopatia secundária à deposição de ferro e sua relação com a concentração de ferro no miocárdio detectada por RMC com a técnica doT2*. MÉTODOS: Estudo de coorte retrospectivo, de três pacientes de uma família diagnosticada com hemocromatose juvenil (mutação HAMP na região 5'UTR), acompanhados por 5 anos, durante o tratamento com quelante de ferro. A RMC foi realizada com aparelho Siemens 1,5T. Foram avaliadas as sequências de cine-RM SSFP para avaliação da função ventricular esquerda e análise do strain pelo software CVI®; e T2* para avaliação de depósito de ferro. Foram obtidos a fração de ejeção ventricular esquerda (FEVE) (anormal < 52%) e o strain global circunferencial (SGC-RM) (anormal < -20%)...(AU)

High prevalence of subclinical atherosclerosis in Brazilian postmenopausal women with low and intermediate risk by Framingham score.

Cardiovascular diseases are the leading cause of mortality among women in several countries. Early detection of subclinical atherosclerosis (SA) could enable the adoption of preventive measures to avoid cardiovascular events. This study aimed to determine the prevalence of SA in Brazilian asymptomatic postmenopausal women in Framingham Risk Score (FRS) low and intermediate groups. Computed tomography (CT) and ultrasound (US) scans were performed in 138 asymptomatic postmenopausal women (56.1 ± 4.9 years of age) to survey for coronary artery and aortic calcification (CT scan) and assess carotid intima-media thickness (CIMT) and identify carotid plaques (US). The mean FRS was 2.64 ± 2.13 %. The prevalence of increased CIMT, carotid plaques, increased CIMT and/or plaques, coronary artery calcification (CAC) >0 and aortic calcification (AC) were, respectively, 45.7, 37.7, 62.3, 23.9 and 45.7 %. Normal imaging tests were found in 22.4 %. SA, defined as at least one abnormal imaging test, was associated with age, FRS, waist-to-rip ratio, systolic and diastolic blood pressure, HDL-c and ApoA1 levels, and ApoA1/ApoB ratio. In logistic regression, SA was associated with higher age (OR 1.108, 95 % CI 1.010-1.215, p = 0.029) and lower ApoA1 levels (OR 0.979, 95 % CI 0.960-0.998, p = 0.029). SA was prevalent in Brazilian postmenopausal women with low and intermediate risk groups (FRS) and was associated with higher age and lower levels of ApoA1. Carotid atherosclerosis was the most common presentation of SA in this group.

High prevalence of subclinical atherosclerosis in Brazilian postmenopausal women with low and intermediate risk by Framingham score

Cardiovascular diseases are the leading causeof mortality among women in several countries. Early detection of subclinical atherosclerosis (SA) could enable the adoption of preventive measures to avoid cardiovascular events. This study aimed to determine the prevalence of SA in Brazilian asymptomatic postmenopausal womenin Framingham Risk Score (FRS) low and intermediategroups. Computed tomography (CT) and ultrasound (US)scans were performed in 138 asymptomatic postmenopausal women (56.1±4.9 years of age) to survey for coronary artery and aortic calcification (CT scan) and assesscarotid intima-media thickness (CIMT) and identify carotidplaques (US). The mean FRS was 2.64±2.13%. The prevalence of increased CIMT, carotid plaques, increased CIMT and/or plaques, coronary artery calcification (CAC)>0 and aortic calcification (AC) were, respectively, 45.7,37.7, 62.3, 23.9 and 45.7%. Normal imaging tests werefound in 22.4%. SA, defined as at least one abnormalimaging test, was associated with age, FRS, waist-to-ripratio, systolic and diastolic blood pressure, HDL-c andApoA1 levels, and ApoA1/ApoB ratio...

Doppler ecografia das artérias carótidas: critérios de velocidade validados pela arteriografia / Doppler Ultrasonography of Carotid Arteries: Velocity Criteria Validated by Arteriography

Introdução: Doppler Ecografia (DE) é largamente utilizada no diagnóstico das estenoses carotídeas. Em 2003, a Sociedade Americana de Radiologia divulgou um consenso propondo critérios para graduação das estenoses da Artéria Carótida Interna (ACI). Em 2009, um grupo do Reino Unido apresentou recomendações para realização da DE das artérias carótidas.Objetivo: Avaliar a acurácia dos critérios velocimétricos utilizados na graduação das estenoses da artéria carótidainterna por Doppler Ecografia comparados à arteriografia.Métodos: Em 73 pacientes (146 ACI), foram avaliados: Pico de Velocidade Sistólica (PVS), Velocidade DiastólicaFinal (VDF) da ACI e razão PVS ACI/Artéria Carótida Comum (ACC), para detecção de estenoses < 50%, 50% - 69% (PVS: 125 - 230 cm/s), 70% - 99% (PVS > 230 cm/s). A correlação entre DE e arteriografia foi feita pelo método de Spearman e p < 0,05 considerado estatisticamente significativo. Resultados: A idade média dos pacientes foi 69 anos, 47 (64%) homens, 27 (37%) com acidente vascular encefálico, e 13 (18%)ataque isquêmico transitório. O melhor critério para estenoses de 50% - 69% foi PVS ACI ≥ 141 cm/s (sensibilidade: 94%, especificidade: 90%, acurácia: 93%) (AUC 0,97). Para estenoses entre 70% ‑ 99%, PVS ACI ≥ 176 cm/s mostrou sensibilidade: 92%; especificidade: 87%; acurácia: 90%; PVS ACI ≥ 230 cm/s teve sensibilidade: 89%; especificidade: 89%; acurácia:89% (AUC 0,96); e a razão PVS ACI/ACC≥ 4,0 teve sensibilidade: 70%; especificidade: 100%; e acurácia: 81% (AUC 0,96). Seis oclusões de ACI foram detectadas à DE e arteriografia. A correlação DE e arteriografia foi: PVS (0,81 – p < 0,001); VDF (0,78 – p < 0,001) e razão PVS ACI/ACC (0,81 – p < 0,001). Conclusões: Doppler Ecografia é um método confiável na detecção das estenoses carotídeas, correlacionando-se bem com a arteriografia, sendo importante validar os critérios DE que melhor se aplicam a cada serviço.

Introduction: The Doppler Ultrasonography (DU) is largely used to diagnose carotid stenoses. In 2003, the American Society of Radiology issued a consensus establishing criteria for gradating the stenoses of the Internal Carotid Artery (ICA). In 2009, a group in the United Kingdom presented recommendations for performing DU of carotid arteries. Objective: Evaluating the accuracy of the velocimetric criteria used to gradate internal carotid artery stenoses by Doppler Ultrasonographycompared to arteriography. Methods: We evaluated 73 patients (146 ICA): Peak Systolic Velocity (PSV), End-Diastolic Velocity (EDV) of ICA and the ICA/Common Carotid Artery (CCA) PSV ratio to detect stenoses < 50%, 50% - 69% (PSV: 125-230 (cm/s), 70% - 99% (PSV > 230 (cm/s). The correlation between DU and arteriography was ascertained with the Spearman’s method and p < 0.05 deemed statistically significant.Results: The patients’ average age was 69 years, 47 (64%) men, 27 (37%) with cerebrovascular accident, and 13 (18%), transient ischemic attack.The best criterion for stenoses of 50% - 69% was ICA PSV ≥ 141 cm/s (sensitivity: 94%, specificity: 90%, accuracy: 93%) (AUC 0.97). For stenoses between 70% - 99%, ICA PSV ≥ 176 cm/s presented sensitivity: 92%; specificity: 87%; accuracy: 90%; ICA PSV ≥ 230 cm/s presented sensitivity:89%; specificity: 89%; accuracy: 89% (AUC 0.96); and ICA/CCA PSV ratio ≥ 4.0 presented sensitivity: 70%; specificity: 100%; and accuracy:81% (AUC 0.96). Six ICA occlusions were detected by DU and arteriography. The DU and arteriography correlation was: PSV (0.81 – p < 0.001);EDV (0.78 – p < 0.001) and ICA/CCA PSV ratio (0.81 – p < 0.001).Conclusions: The Doppler Ultrasonography is a reliable method for detecting carotid stenoses, having a good correlation with arteriography.In this respect, validating the DU criteria which better suit each service is important.

Influência da lesão carotídea no pós-operatório de revascularização miocárdica e sua evolução tardia / Influence of carotid injury in post-myocardial revascularization surgery and its late evolution

FUNDAMENTO: Cerca de 30% dos AVE perioperatórios da cirurgia de revascularização do miocárdio (CRM) são decorrentes de lesões carotídeas, sem redução de risco confirmada por intervenção perioperatória. OBJETIVOS: Avaliar o impacto da doença carotídea e a intervenção perioperatória nos pacientes submetidos à CRM. MÉTODOS: Estudo retrospectivo observacional, avaliando 1.169 pacientes com idade > 65 anos submetidos à CRM entre janeiro de 2006 e dezembro de 2010, acompanhados, em média, por 49 meses. Todos foram submetidos à ultrassonografia de carótidas prévia à CRM. Definiu-se doença carotídea quando lesão > 50%. O desfecho primário foi composto pela incidência de AVE, acidente isquêmico transitório (AIT) e óbito por AVE. RESULTADOS: A prevalência da doença carotídea foi de 19,9% dos pacientes. A incidência do desfecho primário entre portadores e não portadores foi de 6,5% e 3,7%, respectivamente (p = 0,0018). Nos primeiros 30 dias, ocorreram 18,2% dos eventos. Relacionaram-se a doença carotídea: disfunção renal (OR 2,03, IC95% 1,34-3,07; p < 0,01), doença arterial periférica (OR 1,80, IC95% 1,22-2,65; p < 0,01) e infarto do miocárdio prévio (OR 0,47, IC95% 0,35-0,65; p < 0,01). Quanto ao desfecho primário, foram associados AIT prévio (OR 5,66, IC95% 1,67-6,35; p < 0,01) e disfunção renal (OR 3,28, IC95% 1,67-6,45; p < 0,01). Nos pacientes com lesão > 70%, a intervenção carotídea perioperatória apresentou incidência de 17% no desfecho primário contra 4,3% na conduta conservadora (p = 0,056) sem diferença entre abordagens percutânea e cirúrgica (p = 0,516). CONCLUSÃO: A doença carotídea aumenta o risco para AVE, AIT ou morte por AVE na CRM. Entretanto, a intervenção carotídea não foi relacionada à redução do desfecho primário.

BACKGROUND: Approximately 30% of perioperative CVA of myocardial revascularization surgery (MRS) are a result of carotid injuries, without reduction of risk confirmed by perioperative intervention. OBJECTIVES: Evaluate the impact of carotid disease and perioperative intervention in patients subjected to MRS. METHODS: Observational, retrospective study, evaluating 1169 patients aged > 69 years undergoing MRS from January, 2006 and December, 2010, monitored, on average, for 49 months. All patients were subjected to ultrasonography of carotids before MRS. It was defined as carotid disease when lesion > 50%. The primary outcome was composed of CVA incidence, transitory ischemic accident (TIA) and death due CVA. RESULTS: Prevalence of carotid disease was of 19.9% of patients. The incidence of primary outcome between unhealthy and healthy patients was of 6.5% and 3.7%, respectively (p = 0.0018). In the first 30 days, there were 18.2% of events. Were related to carotid disease: renal dysfunction (OR 2.03, IC95% 1.34-3.07; p < 0.01), peripheral arterial disease (OR 1.80, IC95% 1.22-2.65; p < 0.01) and previous myocardial infarction (OR 0.47, IC95% 0.35-0.65; p < 0.01). Regarding the primary outcome, were associated the previous TIA (OR 5.66, IC95% 1.67-6.35; p < 0.01) and renal dysfunction (OR 3.28, IC95% 1.67-6.45; p < 0.01). In patients with lesion >70%, perioperative carotid intervention demonstrated an incidence of 16% in primary outcome compared to 4.3% in conservatory treatment (p = 0.056) with no difference between percutaneous and surgical approaches (p = 0.516). CONCLUSION: Carotid disease increases the risk of CVA, TIA or death due to CVA in MRS. However, the carotid intervention was not related to reduction of primary outcome.

Influence of carotid injury in post-myocardial revascularization surgery and its late evolution.

BACKGROUND: Approximately 30% of perioperative CVA of myocardial revascularization surgery (MRS) are a result of carotid injuries, without reduction of risk confirmed by perioperative intervention. OBJECTIVES: Evaluate the impact of carotid disease and perioperative intervention in patients subjected to MRS. METHODS: Observational, retrospective study, evaluating 1169 patients aged > 69 years undergoing MRS from January, 2006 and December, 2010, monitored, on average, for 49 months. All patients were subjected to ultrasonography of carotids before MRS. It was defined as carotid disease when lesion > 50%. The primary outcome was composed of CVA incidence, transitory ischemic accident (TIA) and death due CVA. RESULTS: Prevalence of carotid disease was of 19.9% of patients. The incidence of primary outcome between unhealthy and healthy patients was of 6.5% and 3.7%, respectively (p = 0.0018). In the first 30 days, there were 18.2% of events. Were related to carotid disease: renal dysfunction (OR 2.03, IC95% 1.34-3.07; p < 0.01), peripheral arterial disease (OR 1.80, IC95% 1.22-2.65; p < 0.01) and previous myocardial infarction (OR 0.47, IC95% 0.35-0.65; p < 0.01). Regarding the primary outcome, were associated the previous TIA (OR 5.66, IC95% 1.67-6.35; p < 0.01) and renal dysfunction (OR 3.28, IC95% 1.67-6.45; p < 0.01). In patients with lesion >70%, perioperative carotid intervention demonstrated an incidence of 16% in primary outcome compared to 4.3% in conservatory treatment (p = 0.056) with no difference between percutaneous and surgical approaches (p = 0.516). CONCLUSION: Carotid disease increases the risk of CVA, TIA or death due to CVA in MRS. However, the carotid intervention was not related to reduction of primary outcome.

Improvement of atherosclerotic markers in non-diabetic patients after bariatric surgery.

BACKGROUND: The objective of this study was to assess the impact of bariatric surgery performed in extremely obese non-diabetic subjects on the following parameters: endothelial function, inflammatory processes (assessed by high-sensitivity C-reactive protein [hs-CRP]), carotid artery intima-media thickness (CIMT), and glucose and lipid profiles. METHODS: Forty-seven obese individuals with body mass index >40 kg/m(2) underwent bariatric surgery and returned for post-procedure assessment between 6 and 19 months after surgery. Ninety-three percent of patients were female. Their age ranged from 18 to 65 (mean 41) years old at baseline. Baseline was defined as the maximum of 30 days before surgery. Before and after surgery, all patients were subjected to a brachial artery ultrasound examination to evaluate endothelial-dependent dilation, CIMT by ultrasound, and laboratory analyses including glucose, lipid and inflammatory profiles were performed. RESULTS: Subjects lost an average of 33 % of their original weight (p < 0.001). Flow-mediated dilation showed significant improvement after surgery from 7.4 % to 18.9 % (p < 0.001) on average. There was regression of CIMT, with the median being reduced from 0.8 to 0.5 mm (p < 0.001). The median Hs-CRP reduced from 0.83 to 0.18 mg/dl (p < 0.001), while glucose and lipid profiles were also improved after surgery. CONCLUSIONS: This study shows that severely obese, non-diabetic patients who had pronounced weight loss after bariatric surgery had an overall improvement in brachial flow-mediated dilation, CIMT, high-sensitivity CRP, and glucose and lipid metabolism. The best responses of the brachial flow-mediated dilation after surgery were observed in non-smokers and in younger subjects.

Improvement of atherosclerotic markers in non-diabetic patients after bariatric surgery

Background The objective of this study was to assess the impact of bariatric surgery performed in extremely obesenon-diabetic subjects on the following parameters: endothelial function, inflammatory processes (assessed by highsensitivity C-reactive protein [hs-CRP]), carotid arteryintima-media thickness (CIMT), and glucose and lipid profiles. Methods Forty-seven obese individuals with body mass index >40 kg/m2 underwent bariatric surgery and returned for post-procedure assessment between 6 and 19 months after surgery. Ninety-three percent of patients were female.Their age ranged from 18 to 65 (mean 41) years old at baseline. Baseline was defined as the maximum of 30 days before surgery. Before and after surgery, all patients were subjected to a brachial artery ultrasound examination to evaluate endothelial-dependent dilation, CIMT by ultrasound, and laboratory analyses including glucose, lipidand inflammatory profiles were performed. Results Subjects lost an average of 33 % of their original weight (p<0.001). Flow-mediated dilation showed significant improvement after surgery from 7.4 % to 18.9 % (p<0.001)on average. There was regression of CIMT, with the median being reduced from 0.8 to 0.5mm(p<0.001). The median Hs-CRP reduced from 0.83 to 0.18 mg/dl (p<0.001), while glucose and lipid profiles were also improved after surgery. Conclusions This study shows that severely obese, non diabetic patients who had pronounced weight loss after bariatric surgery had an overall improvement in brachial flow-mediated dilation, CIMT, high-sensitivity CRP, and glucose and lipid metabolism. The best responses of the brachial flow-mediated dilation after surgery were observed in non-smokers and in younger subjects.

Aneurisma venoso gigante de veia ilíaca externa secundário a fístula arteriovenosa traumática: relato de caso / Giant external-iliac-vein aneurysm secondary to traumatic arteriovenous fistula: a case report

Aneurismas venosos abdominais são raros. Os localizados nas veias ilíacas externas estão entre os mais infrequentes aneurismas venosos publicados na literatura. Relatamos o caso de um paciente jovem com aneurisma venoso gigante de veia ilíaca externa secundário a uma fístula arteriovenosa adquirida há 20 anos, tratado pelos métodos convencional e endovascular com sucesso.

Venous abdominal aneurysms are rare entities, especially at the external iliac vein. We report the case of a young male patient who presented with a giant external-iliac-vein aneurysm secondary to an arteriovenous fistula acquired 20 years earlier, and treated successfully by conventional and endovascular methods in our service.

Experiência inicial com o sistema de reversão de fluxo em pacientes submetidos a angioplastia carotídea / Initial experience with the flow reversal system in patients undergoing carotid angioplasty

Introdução: O tratamento endovascular da doença aterosclerótica carotídea vem evoluindo continuamente, embora possam ocorrer complicações embólicas ou isquêmicas, mesmo com o uso dos sistemas de proteção cerebral. Este estudo teve como objetivo avaliar os resultados de uma série inicial de pacientes que utilizaram o sistema de reversão de fluxo durante angioplastia carotídea. Métodos: Estudo prospectivo, não-randomizado, não-controlado, realizado em um único centro. Foram incluídos pacientes assintomáticos com lesão > 70% ou sintomáticos com lesão > 50% em artéria carótida interna. Foi utilizado o sistema de reversão de fluxo, com pré-dilatação em casos selecionados e uso de stents de células abertas em todos os casos. Avaliou-se a ocorrência de acidentes vasculares encefálicos (AVEs) maiores e menores, ataques isquêmicos transitórios (AITs), infarto agudo do miocárdio (IAM) e óbito até 30 dias pós-procedimento. Resultados: Entre setembro de 2010 e fevereiro de 2011 foram realizadas angioplastias carotídeas em 17 pacientes, a maioria do sexo masculino (70,6%), com médiade idade de 66,7 + 8 anos, sendo 17,6% diabéticos. Cerca de metade dos pacientes era sintomática, 5 pacientes tinham história de AVE prévio (29,4%) e 3, de AIT (17,7%) prévio. Sucesso técnico foi obtido em 100% dos casos. Houve um caso de óbito (5,9%), 24 horas após o procedimento, em paciente de alto risco cirúrgico tratado na fase evolutiva de IAM por apresentar AITs de repetição. Não ocorreram casos de AVE maior ou menor ou AIT durante o período de acompanhamento. Conclusões: Neste estudo, o sistema dereversão de fluxo mostrou ser eficiente e seguro em pacientes submetidos a angioplastia carotídea.

Background: The endovascular treatment of carotid atherosclerotic disease has continuously evolved, although ischemic or embolic complications may occur even with the use of cerebral protection systems. This study was aimed at evaluating the perioperative results of an initial series of patients using the flow reversal system during carotid angioplasty. Methods: This was a prospective, non-randomized, non-controlled, singlecenterstudy. Asymptomatic patients with lesions > 70% or symptomatic patients with lesions > 50% in the internal carotid artery were included. The flow reversal system was used with pre-dilation in selected cases and open-cell stents were used in all cases. We evaluated the occurrence of major and minor strokes, transient ischemic attacks (TIAs), acute myocardial infarction (AMI) and death within 30 days after the procedure. Results: Between September 2010 and February 2011 carotid angioplasty was performed in 17 patients, most of them male (70.6%), with mean age of 66.7 +8 years, of which 17.6% were diabetic. Approximately half of the patients were symptomatic, 5 patients had a prior history of stroke (29.4%) and 3 had TIA (17.7%). Technical success was achieved in 100% of the patients. There was one death (5.9%), 24 hours after the procedure in a high surgical risk patient treated in the evolution phase of an AMI due to repetitive TIAs. There were no cases of major or minor strokes or TIAs during the follow-up. Conclusions: In our study, the flow reversal system proved to be effective and safe in patients undergoing carotid angioplasty.

Braquiterapia intracoronária / intracoronary brachytherapy

A angioplastia transluminal coronariana foi desenvolvida por Gruetzig na década de 70 para tratar lesões coronarianas, ateroscleróticas, utilizando um catéter de lúmen duplo com um balão com distensão na ponta...

Braquiterapia intracoronária / Intracoronary brachytherapy

A angioplastia transluminal coronariana foi desenvolvida por Gruetzig na década de 70 para tratar lesões coronarianas, ateroscleróticas, utilizando um catéter de lúmen duplo com balão com distensão na ponta. Apesar de segura e eficaz, a angioplastia criou um fenômeno iatrogênico novo: a restenose, um estreitamento progressivo e lento da luz coronária, relacionada à cicatrização no local da dilatação.Os mecanismos envolvidos na estenose incluem o remodelamento negativo e um processo exuberante com proliferação celular neo-intimal e síntese de matriz extracelular. O implante dos stents pode minimizar o remodelamento dos vasos tratados, e estudos clínicos demonstratram uma diminuição significativa na taxa de reestenose...

Braquiterapia intracoronária / Intracoronary brachytherapy

Nos últimos anos, as indicações para angioplastia coronária transluminal percutânea ampliaram-se e com isso o número de "complicações" inerentes ao procedimentos, oclusões (sub) agudas e restenose...