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1.
J. vasc. bras ; 12(3): 193-201, Jul-Sep/2013. tab, graf
Article in Portuguese | LILACS | ID: lil-695199

ABSTRACT

CONTEXTO: A doença aterosclerótica da carótida extracraniana é uma das principais causas evitáveis de acidente vascular cerebral isquêmico (AVCi), sendo este a segunda causa mais comum de morte nos países desenvolvidos. Nos grandes estudos sobre a cirurgia carotídea, a indicação estava embasada fundamentalmente no grau de estenose arterial. Analisar somente o grau de estenose, entretanto, não revela todas as características da placa, na medida em que a morfologia e a composição da placa complementam a avaliação da doença carotídea avançada e são fundamentais para a análise e o acompanhamento da maioria das placas carotídeas tratadas clinicamente. OBJETIVO: Correlacionar a caracterização dos componentes da placa de ateroma pela histologia virtual ultrassonográfica (HVUS) com a histologia. MÉTODOS: As imagens pré-operatórias obtidas por ultrassonografia transcutânea de 12 placas de ateroma de bifurcação carotídea foram submetidas a um programa de computador, o qual correlacionou os níveis de cinza com os prováveis componentes da placa da bifurcação carotídea (HVUS). Estes achados foram correlacionados com o exame anatomopatológico das placas coletadas pela cirurgia de endarterectomia. RESULTADOS: O coeficiente de correlação de Pearson para os conteúdos de lipídeos e músculo/tecido fibroso foram, respectivamente, R=0,83 para gordura e R=0,91 para músculo/tecido fibroso. Quanto ao cálcio e ao sangue, foram R=0,05 e R=0,19, respectivamente. CONCLUSÕES: O presente trabalho corrobora a literatura demonstrando que a histologia virtual computadorizada baseada em ultrassonografia transcutânea apresenta boa correlação com os achados da histologia quanto ao conteúdo da placa. Maiores ...


BACKGROUND: Extracranial carotid artery atherosclerosis is a major preventable cause of strokes, the second most common cause of death in developed countries. The degree of arterial lumen stenosis is the basis for surgical indications, but does not provide information about other plaque aspects. Studies in the literature suggest that the morphological characteristics of the plaque and its composition should also be included in the assessment of this disease. OBJECTIVE: Investigate the correlation between atherosclerotic plaque composition defined by computer-assisted analysis of ultrasound images (virtual histology - USVH) and conventional histology. METHOD: The images of twelve plaques, obtained during preoperative ultrasound scanning, were analyzed by computer, and the grey scale images were correlated with the plaque components and subsequently compared with the histological findings of the analysis of the endarterectomy specimens. RESULTS: The amount of lipids and fibromuscular tissue were strongly correlated in the two tests (R=0.83 and 0.91). There were no significant correlations with amount of blood or calcium (R=0.05 and 0.19). CONCLUSION: This study confirmed the usefulness of noninvasive USVH. Further technical improvements and software developments may promote the clinical application of this method. .


Subject(s)
Humans , Carotid Artery Diseases/epidemiology , Carotid Artery Diseases , Endarterectomy, Carotid/methods , Plaque, Atherosclerotic , Tomography, Emission-Computed
2.
Angiology ; 61(7): 690-7, 2010 Oct.
Article in English | MEDLINE | ID: mdl-20688788

ABSTRACT

OBJECTIVE: To measure the arterial volume flow (VF) with duplex scan, calculate femoral/axillary VF ratio, and discuss its applicability as a new index for the hemodynamic significance of an aorto-iliac occlusive lesion. METHODS: Several measures of VF were obtained consecutively with duplex scan in both common femoral and axillary arteries of healthy volunteers with no signs of atherosclerosis and patients with documented evidence of occlusive aorto-iliac disease with segmental pressure measurement. Then the patient group was sent to complimentary evaluation for a second confirmatory examination. RESULTS: There were a total of 635 measures of VF performed in 10 healthy volunteers and 8 patients with severe iliac stenoses or occlusion, 2 of then with bilateral disease. When comparing normal participants and patients with severe iliac stenoses or occlusion, there was statistical significant difference between these 2 groups (P < .01 Mann-Whitney). Similar result was found when comparing patient with diseased limbs with their own contralateral normal side (P < .05 Wilcoxon). And measuring the VF only during the systolic phase was a much more sensitive parameter for differentiating the normal from the diseased. Besides that a good correlation between proximal thigh pressure index and femoral/axillary systolic flow ratio was found in the patient group (P < .01 Spearman correlation). CONCLUSION: The femoral/axillary VF ratio is useful in assessing the hemodynamic significance of aorto-iliac disease, and the systolic femoral-axillary ratio may also be useful as a follow-up tool.


Subject(s)
Arterial Occlusive Diseases/physiopathology , Atherosclerosis/physiopathology , Axillary Artery/physiopathology , Blood Volume/physiology , Iliac Artery/physiopathology , Arterial Occlusive Diseases/diagnostic imaging , Atherosclerosis/diagnostic imaging , Axillary Artery/diagnostic imaging , Femoral Artery/diagnostic imaging , Femoral Artery/physiopathology , Humans , Middle Aged , Regional Blood Flow/physiology , Severity of Illness Index , Ultrasonography, Doppler, Duplex
3.
Angiology ; 57(4): 424-30, 2006.
Article in English | MEDLINE | ID: mdl-17022377

ABSTRACT

It is common belief that the use of high-heeled shoes is deleterious to venous return, by impairing the efficiency of the muscular calf pump. Ambulatory venous pressure obtained with dorsal foot venipuncture is the gold standard in the evaluation of venous pressure during walking, but it is not routinely used in clinical practice. The objective of the present study was to determine the variations in leg venous pressure obtained with a new noninvasive method, in individuals without venous disease, walking without shoes and wearing high-heeled shoes. A new method of evaluation of the venous pressure by means of air plethysmography was applied to 10 volunteers (20 limbs). The patients were evaluated while standing, with orthostatic flexion and extension foot movements, and while walking on a treadmill barefooted and wearing high-heeled shoes. It was found that the variation on the cuff pressure during walking with high-heeled shoes was higher than the variation on the cuff pressure walking barefooted (52.2 +/- 8.89 X 26.65 +/- 6.7 mm Hg, p < 0.0001), and the final hydrostatic venous pressure was lower (51.5 +/- 12.78 X 61.5 +/- 8.44 mm Hg). The use of high-heeled shoes increases muscular effort during walking and diminishes the leg venous pressure compared with barefooted.


Subject(s)
Leg/blood supply , Shoes , Venous Pressure , Walking/physiology , Adult , Blood Pressure Determination , Female , Humans , Middle Aged , Muscle Contraction , Muscle, Skeletal/physiology , Plethysmography/methods
4.
J. vasc. bras ; 4(1): 47-54, 2005. ilus, tab
Article in Portuguese | LILACS | ID: lil-421701

ABSTRACT

Objetivo: O objetivo do presente trabalho é avaliar o percentual de reestenose da carotida interna medido pela ultra-sonografia duplex, no pós-operatório de pacientes submetidos a uma variação técnica da endarterectomia aberta de carótida interna. Método: Foram submetidas a estudo ultra-sonográfico duplex (avaliação em miodo B e medidas de velocidade), 36 carótidas internas (34 paciente)operadas intencionalmente pela técnica de semi-eversão ou eversão parcial da carótida interna. Resultados: Encontrou-se a média de 22,9 por cento de estenose medida pela ultra-sonografia duplex nos pacientes do sexo feminino e 13,3 por cento nos pacientes masculinos (P igual 0,034). Apenas uma paciente apresentou estenose avaliada em 50 por cento (2,8 por cento). Conclusões: Os autores concluem que a técnica de semi-eversão é de execução rápida e simples, resultando em pouca estenose recorrente da carótida intena.


Subject(s)
Aged , Male , Female , Humans , Carotid Artery, Internal/abnormalities , Carotid Artery, Internal/surgery , Endarterectomy, Carotid/methods , Carotid Stenosis/complications , Carotid Stenosis/diagnosis
5.
Rev. ciênc. méd., (Campinas) ; 7(1): 34-7, jan.-abr. 1998. ilus
Article in Portuguese | LILACS | ID: lil-224353

ABSTRACT

Relato de caso de um paciente do sexo masculino, colecistectomizado há três anos apresentando dor abdominal e ascite, intercalados com períodos de diarréia, o qual morreu com alto grau de caquexia. Estudo radiológico com tomografia computadorizada apresentou imagem tipo oment cake, sugerindo invasao neoplásica do peritônio; a necrópsia com cortes topográficos abdominais demonstrou invasao homogênea do peritônio e o estudo microscópico mostrou adenocarcinoma de vesícula biliar, fato comprovado com o estudo anátomo-patológico. Concluiu-se que a tomografia computadorizada, quando bem indicada e interpretada, é importante para o diagnóstico e prognóstico do paciente e que a necrópsia ainda continua o melhor método para checar o estudo complementar.


Subject(s)
Humans , Male , Aged , Adenocarcinoma , Autopsy , Carcinoma , Peritoneal Neoplasms , Gallbladder/anatomy & histology , Abdominal Pain , Ascites , Cachexia , Cholecystectomy , Tomography, X-Ray Computed/statistics & numerical data
6.
Revista de Ciencias Medicas - PUCCAMP ; 1(7): 34-37, jan./abr. 1998.
Article | Index Psychology - journals | ID: psi-8630

ABSTRACT

Relato de caso de um paciente do sexo masculino, colecistectomizado ha tres anos apresentando dor abdominal e ascite, intercalados com periodos de diarreia, o qual morreu com alto grau de caquexia. Estudo radiologico com tomografia computadorizada apresentou imagem tipo oment cade, sugerindo invasao neoplasica do peritonio; a necropsia com cortes topograficos abdominais demonstrou invasao homogenea do peritonio e o estudo microscopico mostrou adnocarcinoma de vesicula biliar, fato comprovado com o estudo anatomo-patologico. Concluiu-se que a tomografia computadorizada, quando bem indicada e interpretada, e importante para o diagnostico e prognostico do paciente e que a necroipsia ainda continua o melhor metodo para checar o estudo complementar.


Subject(s)
Tomography , Adenocarcinoma , Gallbladder , Carcinoma , Case Reports , Tomography , Adenocarcinoma , Gallbladder , Carcinoma
7.
Rev. ciênc. méd. PUCCAMP ; 6(1): 35-9, jan.-abr. 1997. ilus
Article in Portuguese | LILACS | ID: lil-209711

ABSTRACT

Trata da correlaçäo anátomo-clínica e ecocardiográfica de um trombo séptico em valva aórtica, que na ausculta cardíaca revelou sopro diastólico com reforço pré-sistólico em foco mitral (sopro de Austin Flint) e, cujo ecocardiograma näo demonstrou a vegetaçäo. Foi discutido a correlaçäo anátomo-radiológica das embolias pulmonares decorrentes da endocardite bacteriana da valva tricúspide.


Subject(s)
Humans , Male , Adult , Endocarditis, Bacterial/complications , Pulmonary Embolism/etiology , Heart Murmurs/physiopathology , Endocarditis, Bacterial/pathology , Pulmonary Embolism/pathology , Tricuspid Valve/physiopathology
8.
Revista de Ciencias Medicas PUCCAMP ; 1(6): 35-39, jan./abr. 1997.
Article | Index Psychology - journals | ID: psi-8345

ABSTRACT

Trata da correlacao anatomo-clinica e ecocardiografica de um trobo septico em valva aortica, que na ausculta cardiaca revelou sopro diastolico com reforco pre-sistolico em foco mitral (sopro de Austin Flint) e, cujo ecocardiograma nao demonstrou a vegetacao. Foi discutido a correlacao anatomo-radiologica das embolias pulmonares decorrentes da endocardite bacteriana da valva trecuspide.


Subject(s)
Endocarditis, Bacterial , Heart Murmurs , Heart Valves , Endocarditis, Bacterial , Echocardiography , Heart Murmurs , Heart Valves
9.
Revista de Ciencias Medicas PUCCAMP ; 3(4): 108-111, set./dez. 1995.
Article | Index Psychology - journals | ID: psi-914

ABSTRACT

Os autores chamam a atencao para um sinal semiologico de simples verificacao, que e o sinal de Alvarenga-Durozier (presenca de duplo sopro nas arterias femorais ao estetoscopio), no diagnostico diferencial entre insuficiencia aortica e outras doencas capazes de elevar a pressao arterial diferencial, como a aterosclerose, sobretudo quando a ausculta do coracao e duvidosa. Este sinal tambem pode ser usado no diagnostico diferencial entre insuficiencia aortica e insuficiencia pulmonar, quando se tem concomitante a estenose mitral, um sopro diastolico nos focos da base do coracao. Para ilustrar, foi realizado estudo com ecodoppler em duas pacientes, demonstrando que havia fluxo sanguineo retrogrado nas arterias apenas nos casos em que havia a presenca do sinal de Alvarenga-Durozier. Portanto, este sinal representa meio facil e eficaz para se constatar o fluxo sanguineo retrogrado, situacao esta, ocorrida na insuficiencia aortica moderada e grave.


Subject(s)
Aortic Valve Insufficiency , Cardiovascular Diseases , Heart Murmurs , Heart Murmurs
11.
Arq. bras. cardiol ; 62(6): 425-426, jun. 1994.
Article in Portuguese | LILACS | ID: lil-159861

ABSTRACT

PURPOSE--To verify if systolic bulging of floppy mitral cusps can to elastic behavior of their myxomatous collagen tissue. METHODS--Five hearts with floppy mitral valves obtained from autopsies were distended with air (20 to 250 mmHg) through a catheter connected to the left ventricle. It was observed if some area of the atrial surface of the coapted cusps showed variable bulging according to the variation of air injection pressures. Molding of those surfaces (gypsum) allowed the same kind of analysis by other four researches. It was analyzed the cut surfaces of these radially sectioned molds. Lately, isolated tendinae chords were submitted to repeated tractions and observed if they exhibited elastic behavior. Histological study defined the presence of collagen myxomatous degeneration and quantified the amount of elastic tissue. RESULTS--In no case it was detected elastic bulding of mitral cusps. Cut surfaces of the molds confirmed that no increment of the prominent areas occurred, even in those regions with extensive, histologically confirmed, myxomatous substitution of the native collagen tissue. CONCLUSION--Increment of the degree of mitral bulging occurring during ventricular systole can not be ascertained to cusp elasticity but probably to papilar muscle traction


Subject(s)
Humans , Mitral Valve Prolapse/physiopathology , Papillary Muscles/physiopathology , Mitral Valve Prolapse/pathology , Elasticity , Myocardial Contraction/physiology
15.
Arq. bras. cardiol ; 54(5): 327-329, maio 1990. ilus
Article in Portuguese | LILACS | ID: lil-88014

ABSTRACT

Mulher de 76 anos de idade portadora de estenose da valva mitral faleceu em decorrência de embolia arterial periférica. A necrópsia demonstrou associaçäo de comunicaçäo entre átrio esquerdo e seio venoso coronário, estenose do óstio deste segmento venoso e estenose da valva mitral


Woman, 76 years old with mitral stenosis died due to peripherical arterial embolism. The necropsy identified left atrial to coronary sinus fenestration associated with stenosis of the coronary sinus ostium and rheumatic mitral stenosis


Subject(s)
Humans , Female , Aged , Cavernous Sinus/abnormalities , Coronary Disease/complications , Heart Atria/abnormalities , Mitral Valve Stenosis/complications , Coronary Circulation , Coronary Disease/pathology , Mitral Valve Stenosis/pathology
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