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‣ Avaliação da dilatação máxima da artéria braquial em gestantes e não gestantes, fumantes e não fumantes; Maximum dilation of the brachial artery in smoking and nonsmoking pregnant and non-pregnant women

NICOLAU, Luis Guilherme Carvalho; MARTINS, Wellington de Paula; FERREIRA, Adilson Cunha; GALLARRETA, Francisco Maximiliano Pancich; LIMA, Jailson Costa; BARRA, Daniela de Abreu; MAUAD, Fernando Marum; MAUAD FILHO, Francisco
Fonte: Colégio Brasileiro de Radiologia e Diagnóstico por Imagem Publicador: Colégio Brasileiro de Radiologia e Diagnóstico por Imagem
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.519614%
OBJETIVO: Avaliar, por meio da dilatação mediada por fluxo da artéria braquial, em que tempo ocorre a máxima dilatação da artéria braquial e se existe diferença nesta avaliação ao comparar mulheres gestantes e não gestantes, fumantes e não fumantes. MATERIAIS E MÉTODOS: Estudo transversal, no qual o diâmetro da artéria braquial foi avaliado em quatro tempos após estímulo pressórico (30, 60, 90 e 120 segundos) em quatro grupos de mulheres entre 20 e 30 anos de idade assim distribuídos: mulheres gestantes entre 24 e 28 semanas de idade gestacional não fumantes (n = 47) e fumantes (n = 33), e mulheres não gestantes não fumantes (n = 34) e fumantes (n = 19). RESULTADOS: A avaliação da dilatação da artéria braquial nos diferentes tempos após o estímulo pressórico foi máxima para todos os grupos no tempo "60 segundos" após a desinsuflação (p < 0,01). A dilatação mediada por fluxo da artéria braquial foi maior entre as mulheres gestantes não fumantes em comparação às fumantes (p = 0,03), assim como no grupo de mulheres não gestantes não fumantes em comparação às fumantes (p = 0,03). CONCLUSÃO: O hábito de fumar não interferiu no tempo em que ocorre a máxima dilatação da artéria braquial.; OBJECTIVE: To evaluate the time required to achieve maximum brachial artery dilation by means of flow-mediated dilation...

‣ Influence of pregnancy and smoking on brachial artery flow-mediated dilation values and time until maximum response

NICOLAU, Luis G. C.; MARTINS, Wellington P.; GALLARRETA, Francisco M. P.; LIMA, Jailson C.; MAUAD FILHO, Francisco
Fonte: SPRINGER HEIDELBERG Publicador: SPRINGER HEIDELBERG
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.40608%
To evaluate the effect of pregnancy and smoking on endothelial function using brachial artery flow-mediated dilation (FMD) and to determine the time necessary until the occurrence of maximum brachial artery dilation after stimulus. This study was an observational study evaluating 133 women, who were grouped as follows: non-smoking pregnant women (N = 47), smoking pregnant women (N = 33), non-smoking women (N = 34), and smoking pregnant women (N = 19). The diameter of the brachial artery was measured at baseline and at 30, 60, 90 and 120 s after stimulus. The relative change of brachial artery was determined for each of these four moments. FMD measured at 60 s after stimulus was compared between the groups. The maximum FMD was observed at 60 s after cuff release in all groups. FMD was greater among non-smoking pregnant women compared to smoking pregnant women (11.50 +/- A 5.77 vs. 8.74 +/- A 4.83; p = 0.03) and also between non-smoking non-pregnant women compared to smoking non-pregnant women (10.52 +/- A 4.76 vs. 7.21 +/- A 5.57; p = 0.03). Maximum FMD was observed approximately 60 s after stimulus in all groups regardless of smoking and pregnancy status. The smoking habit seems to lead to endothelial dysfunction both in pregnant and non-pregnant women...

‣ Upper limb arterial hemodynamics in high brachial artery bifurcation by color doppler ultrasound

Fragoso, M; Germano, M; Gomes, A; Sousa, M; Rocha, R; Marinho, R; Pignatelli, N; Nunes, V
Fonte: Corporació Parc Taulí Publicador: Corporació Parc Taulí
Tipo: Conferência ou Objeto de Conferência
Publicado em //2014 Português
Relevância na Pesquisa
48.64375%
Background: High bifurcation of the brachial artery is a common anatomic variant, with a prevalence of 12-20% and a challenging Doppler identification. This variant may have hemodynamic implications and compromise the success of a native arteriovenous fistula (AVF). The aim of this study is to compare the hemodynamic characteristics of the upper limb arterial axis based on the location of the brachial bifurcation in patients in need of a vascular access for hemodialysis. Methods: Cross sectional observational study with retrospective data collection. The studied variables were arterial diameter, flow, peak systolic velocity and resistance index of the brachial, radial and ulnar arteries in patients proposed for first vascular access construction between February 2011 and January 2014. Results: Of 153 patients studied, 6,53% had high brachial artery bifurcation. In these patients, the diameter of the brachial artery was smaller (3,77mm±0,64 vs. 4,38mm±1,2; p<0,05) and the resistance index was higher (0,97±0,68 vs. 2,18±0,58; p<0,05). The remaining variables were not statistically different. Conclusions: The brachial, radial and ulnar arteries flow and peak systolic velocity, as well as the diameter and resistance index of the radial and ulnar arteries were independent of the location of the brachial artery bifurcation. The lack of differences in hemodynamic distal arteries characteristics suggests that the success of distal vascular access is not compromised. The smaller diameter and higher resistance index found in the high brachial artery bifurcation patients may recommend an exhaustive research of this anatomical variant in preoperative mapping...

‣ Normal flow-mediated vasodilatation of the brachial artery and carotid artery intima-media thickness in subclinical hypothyroidism

Cabral,M.D.; Teixeira,P.F.S.; Silva,N.A.O.; Morais,F.F.C.; Soares,D.V.; Salles,E.; Henriques,J.M.; Leite,S.P.; Montenegro,C.A.B.; Vaisman,M.
Fonte: Associação Brasileira de Divulgação Científica Publicador: Associação Brasileira de Divulgação Científica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/05/2009 Português
Relevância na Pesquisa
57.94657%
Subclinical hypothyroidism (SHT) is a disease for which exact therapeutic approaches have not yet been established. Previous studies have suggested an association between SHT and coronary heart disease. Whether this association is related to SHT-induced changes in serum lipid levels or to endothelial dysfunction is unclear. The aim of this study was to determine endothelial function measured by the flow-mediated vasodilatation of the brachial artery and the carotid artery intima-media thickness (IMT) in a group of women with SHT compared with euthyroid subjects. Triglycerides, total cholesterol, HDL-C, LDL-C, apoprotein A (apo A), apo B, and lipoprotein(a) were also determined. Twenty-one patients with SHT (mean age: 42.4 ± 10.8 years and mean thyroid-stimulating hormone (TSH) levels: 8.2 ± 2.7 µIU/mL) and 21 euthyroid controls matched for body mass index, age and atherosclerotic risk factors (mean age: 44.2 ± 8.5 years and mean TSH levels: 1.4 ± 0.6 µIU/mL) participated in the study. Lipid parameters (except HDL-C and apo A, which were lower) and IMT values were higher in the common carotid and carotid bifurcation of SHT patients with positive serum thyroid peroxidase antibodies (TPO-Ab) (0.62 ± 0.2 and 0.62 ± 0.16 mm for the common carotid and carotid bifurcation...

‣ Assessment of endothelial function by flow-mediated dilation of the brachial artery in adolescents with a history of preeclampsia or a normotensive pregnancy

Andrade,Joana Adalgisa Furtado Magalhães; Carvalho,Francisco Herlânio Costa; Mota,Rosa Maria Salani; Andrade,Guilherme Augusto Magalhães; Feitosa,Helvécio Neves; Ibiapina,Flávio Lúcio Pontes; Medeiros,Francisco das Chagas
Fonte: Instituto de Medicina Integral Prof. Fernando Figueira Publicador: Instituto de Medicina Integral Prof. Fernando Figueira
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2014 Português
Relevância na Pesquisa
68.01681%
Objectives: to determine the prevalence of endothelial dysfunction and its association with a history of mild and severe preeclampsia in adolescents. Methods: a cross-sectional study was carried out at the MEAC-UFC with 103 primiparous adolescents postpartum. The assessment of endothelial function was performed by way of flow-mediated dilatation of the brachial artery. Variables (age, body mass index, gestational age at delivery, systolic and diastolic blood pressure and flow-mediated dilation) were compared between groups. p<0.05 was considered to be statistically significant. Results: twenty-four (23.3%) patients had preeclampsia (PE): 11 mild and 13 severe. The overall prevalence of endothelial dysfunction was 23.3% (21.5% of patients with normotensive pregnancies and 29.2% of the PE patients: 18.2% of those with mild PE and 38.5% of those with severe PE). The figures were statistically significant for systolic blood pressure, p=0.007. Conclusions: patients with a history of PE have higher systolic blood pressure than patients with a history of normotensive pregnancy, but did not have more endothelial dysfunction.

‣ The superficial ulnar artery: development and clinical significance

Reddy,Srinivasulu; Vollala,Venkata Ramana
Fonte: Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV) Publicador: Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2007 Português
Relevância na Pesquisa
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The principal arteries of the upper limb show a wide range of variation that is of considerable interest to orthopedic surgeons, plastic surgeons, radiologists and anatomists. We present here a case of superficial ulnar artery found during the routine dissection of right upper limb of a 50-year-old male cadaver. The superficial ulnar artery originated from the brachial artery, crossed the median nerve anteriorly and ran lateral to this nerve and the brachial artery. The superficial ulnar artery in the arm gave rise to a narrow muscular branch to the biceps brachii. At the elbow level the artery ran superficial to the bicipital aponeurosis where it was crossed by the median cubital vein. It then ran downward and medially superficial to the forearm flexor muscles, and then downward to enter the hand. At the palm, it formed the superficial and deep palmar arches together with the branches of the radial artery. The presence of a superficial ulnar artery is clinically important when raising forearm flaps in reconstructive surgery. The embryology and clinical significance of the variation are discussed.

‣ Anomalous origin of the deep brachial artery (profunda brachii) observed in bilateral arms: case report

Paula,Rafael Cisne de; Erthal,Rafael; Fernandes,Rodrigo Mota Pacheco; Babinski,Marcio Antônio; Silva,Julio Guilherme; Chagas,Carlos Alberto Araujo
Fonte: Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV) Publicador: Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2013 Português
Relevância na Pesquisa
68.357285%
During an ordinary dissection, a cadaver showed a bilateral anomalous origin of the deep brachial artery, where this vessel appeared like a branching of the subscapular artery with common trunk, which included the posterior circumflex humeral artery. The course and distribution of the deep brachial artery in the back compartment were relatively consistent with previous reports. Arterial variations can be damaged through iatrogenic means if not properly documented. The knowledge of this case is very important in clinical medicine and in surgeries in this compartment to prevent any injury.

‣ Handgrip exercise increases postocclusion hyperaemic brachial artery dilatation

Agewall, S; Whalley, G; Doughty, R; Sharpe, N
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /07/1999 Português
Relevância na Pesquisa
48.60546%
OBJECTIVE—To examine the effect of handgrip exercise induced ischaemia on non-invasive assessment of endothelial function in the brachial artery.
DESIGN AND SETTING—High frequency ultrasound was used to measure brachial artery diameter at rest and after reactive hyperaemia induced by forearm cuff occlusion with and without handgrip exercise induced ischaemia.
SUBJECTS—10 healthy subjects, < 40 years, without known cardiovascular risk factors.
MAIN OUTCOME MEASURES—Brachial artery dilatation and blood flow.
RESULTS—Hyperaemia following forearm occlusion with handgrip exercise induced ischaemia increased brachial artery diameter significantly more than hyperaemia following occlusion alone, 6.9 (3.2)% and 4.5 (1.6)%, respectively (95% confidence interval 0.3% to 4.5%). There was no difference in peak blood flow with and without exercise induced ischaemia
CONCLUSIONS—Handgrip exercise induced ischaemia with forearm occlusion caused more pronounced brachial artery dilatation than occlusion alone without change in peak blood flow. This suggests continued brachial artery responsiveness to the stimulus of ischaemia despite maximum blood flow and peripheral vasodilatation with occlusion alone.


Keywords: forearm blood flow; vasodilatation; handgrip exercise; ischaemia; endothelial function

‣ Physical activity during daily life and brachial artery flow-mediated dilation in peripheral arterial disease

Payvandi, Laila; Dyer, Alan; McPherson, David; Ades, Philip; Stein, James; Liu, Kiang; Ferrucci, Luigi; Criqui, Michael H; Guralnik, Jack M; Lloyd-Jones, Donald; Kibbe, Melina R; Liang, Susan T; Kane, Bonnie; Pearce, William H; Verta, Michael; McCarthy, W
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /08/2009 Português
Relevância na Pesquisa
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We determined whether higher levels of physical activity in daily life are associated with better brachial artery flow-mediated dilation (FMD) among individuals with lower extremity peripheral arterial disease (PAD). Participants were 111 men and women with PAD (ankle–brachial index (ABI) ≤ 0.95) who completed baseline testing in the Study to Improve Leg Circulation (SILC). We evaluated FMD of the brachial artery at baseline and at 60 seconds following 4 minutes of suprasystolic blood pressure cuff inflation. Physical activity was measured continuously over 7 days using a vertical accelerometer (Caltrac) and a pedometer (Digiwalker). Adjusting for age, sex, race, ABI, cardiovascular risk factors and other potential confounders, higher levels of physical activity were associated with a greater percent change in brachial artery FMD at 60 seconds post cuff deflation for both Caltrac (1st tertile of activity +4.81% change; 2nd tertile +4.60% change; 3rd tertile +7.23% change; p-trend = 0.018) and the Digiwalker (1st tertile of activity +3.76% change; 2nd tertile +6.25% change; 3rd tertile +7.25% change; p-trend = 0.001). Similar findings were observed for absolute change in brachial artery FMD 60 seconds after cuff deflation. In conclusion...

‣ Impact of age, sex, and exercise on brachial artery flow-mediated dilatation

Black, Mark A.; Cable, N. Timothy; Thijssen, Dick H. J.; Green, Daniel J.
Fonte: American Physiological Society Publicador: American Physiological Society
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.40608%
Flow-mediated dilatation (%FMD), an index of nitric oxide (NO)-mediated vasodilator function, is regarded as a surrogate marker of cardiovascular disease. Aging is associated with endothelial dysfunction, but underlying sex-related differences may exist and the effects of fitness and exercise on endothelial dysfunction in men (M) and women (W) are poorly understood. We compared %FMD of the brachial artery in 18 young [Y, 26 ± 1 yr; 9 M and 9 W], 12 older fit (OF, 57 ± 2 yr; 6 M and 6 W), and 16 older sedentary (OS, 59 ± 2 yr; 8 M and 8 W) subjects. Glyceryl trinitrate (GTN) administration was used to assess endothelium-independent vasodilatation, and the FMD-to-GTN ratio was calculated to characterize NO dilator function in the context of smooth muscle cell sensitivity. Brachial %FMD in Y (7.1 ± 0.8%) was significantly higher compared with OS (4.8 ± 0.7%, P < 0.05), but not OF (6.4 ± 0.7%). Differences between Y and OS subjects were due primarily to lower FMD in the OS women (4.3 ± 0.6%). OS women exhibited significantly lower FMD-to-GTN ratios compared with Y (P < 0.05) and OF women (P < 0.05), whereas these differences were not apparent in men. Exercise training improved brachial artery NO dilator function (FMD-to-GTN ratio) after 24 wk (P < 0.05) in OS women...

‣ Exercise-induced brachial artery vasodilation: effects of antioxidants and exercise training in elderly men

Donato, Anthony J.; Uberoi, Abhimanyu; Bailey, Damian M.; Walter Wray, D.; Richardson, Russell S.
Fonte: American Physiological Society Publicador: American Physiological Society
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.571084%
Aging, vascular function, and exercise are thought to have a common link in oxidative stress. Of the 28 subjects studied (young, 26 ± 2 yr; old, 71 ± 6 yr), 12 took part in a study to validate an antioxidant cocktail (AOC: vitamins C, E, and α-lipoic acid), while the remaining 8 young and 8 old subjects performed submaximal forearm handgrip exercise with placebo or AOC. Old subjects repeated forearm exercise with placebo or AOC following knee-extensor (KE) exercise training. Brachial arterial diameter and blood velocity (Doppler ultrasound) were measured at rest and during exercise. During handgrip exercise, brachial artery vasodilation in the old subjects was attenuated compared with that in young subjects following placebo (maximum = ∼3.0 and ∼6.0%, respectively). In contrast to the previously documented attenuation in exercise-induced brachial artery vasodilation in the young group with AOC, in the old subjects the AOC restored vasodilation (maximum = ∼7.0%) to match the young. KE training also improved exercise-induced brachial artery vasodilation. However, in the trained state, AOC administration no longer augmented brachial artery vasodilation in the elderly, but rather attenuated it. These data reveal an age-related pro-/antioxidant imbalance that impacts vascular function and show that exercise training is capable of restoring equilibrium such that vascular function is improved and the AOC-mediated reduction in free radicals now negatively impacts brachial artery vasodilation...

‣ Brachial Artery Diameter, Blood Flow and Flow-mediated Dilation in Sleep-Disordered Breathing

Chami, Hassan A.; Keyes, Michelle J.; Vita, Joseph A.; Mitchell, Gary F.; Larson, Martin G.; Fan, Shuxia; Vasan, Ramachandran S.; O’Connor, George T.; Benjamin, Emelia J.; Gottlieb, Daniel J.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /11/2009 Português
Relevância na Pesquisa
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Clinic-based case-control studies linked sleep-disordered breathing (SDB) to markers of endothelial dysfunction. We attempted to validate this association in a large community-based sample, and evaluate the relation of SDB to arterial diameter and peripheral blood flow. This community-based cross-sectional observational study included 327 men and 355 women, age 42 to 83 years, from the Framingham Heart Study site of the Sleep Heart Health Study. Polysomnographically derived apnea-hypopnea index and hypoxemia index (percent sleep time with oxyhemoglobin saturation below 90%) were used to quantify the severity of SDB. Brachial artery ultrasound measurements included baseline diameter, percent flow-mediated dilation, and baseline and hyperemic flow velocity and volume. Baseline brachial artery diameter was significantly associated with both apnea-hypopnea index and hypoxemia index. The association was diminished by adjustment for body mass index, but remained significant for apnea-hypopnea index. Age-, sex-, race-and body mass index-adjusted mean diameters were 4.32, 4.33, 4.33, 4.56, 4.53 mm, respectively, for those with apnea-hypopnea index <1.5, 1.5–4.9, 5–14.9, 15–29.9, ≥30; p=0.03. Baseline flow measures were associated with apnea-hypopnea index but this association was non-significant after adjusting for body mass index. No significant association was observed between measures of SDB and percent flow-mediated dilation or hyperemic flow in any model. In conclusion...

‣ Increased brachial artery retrograde shear rate at exercise onset is abolished during prolonged cycling: role of thermoregulatory vasodilation

Simmons, Grant H.; Padilla, Jaume; Young, Colin N.; Wong, Brett J.; Lang, James A.; Davis, Michael J.; Laughlin, M. Harold; Fadel, Paul J.
Fonte: American Physiological Society Publicador: American Physiological Society
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.40608%
Acute leg exercise increases brachial artery retrograde shear rate (SR), while chronic exercise improves vasomotor function. These combined observations are perplexing given the proatherogenic impacts of retrograde shear stress on the vascular endothelium and may be the result of brief protocols used to study acute exercise responses. Therefore, we hypothesized that brachial artery retrograde SR increases initially but subsequently decreases in magnitude during prolonged leg cycling. Additionally, we tested the role of cutaneous vasodilation in the elimination of increased retrograde SR during prolonged exercise. Brachial artery diameter and velocity profiles and forearm skin blood flow and temperature were measured at rest and during 50 min of steady-state, semirecumbent leg cycling (120 W) in 14 males. Exercise decreased forearm vascular conductance (FVC) and increased retrograde SR at 5 min (both P < 0.05), but subsequently forearm and cutaneous vascular conductance (CVC) rose while retrograde SR returned toward baseline values. The elimination of increased retrograde SR was related to the increase in FVC (r2 = 0.58; P < 0.05) and CVC (r2 = 0.32; P < 0.05). Moreover, when the forearm was cooled via a water-perfused suit between minutes 30 and 40 to blunt cutaneous vasodilation attending exercise...

‣ Relation between Digital Peripheral Arterial Tonometry and Brachial Artery Ultrasound Measures of Vascular Function in Patients with Coronary Artery Disease and in Healthy Volunteers

Lee, Craig R.; Bass, Almasa; Ellis, Kyle; Tran, Bryant; Steele, Savanna; Caughey, Melissa; Stouffer, George A.; Hinderliter, Alan L.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.67175%
Digital peripheral arterial tonometry (PAT) is an emerging, non-invasive method to assess vascular function. The physiology underlying this phenotype, however, remains unclear. Therefore, we evaluated the relationship between digital PAT and established brachial artery ultrasound measures of vascular function under basal conditions and following reactive hyperemia. Using a cross-sectional study design, digital PAT and brachial artery ultrasound with pulsed wave Doppler were simultaneously completed at baseline and following reactive hyperemia in both individuals with established coronary artery disease (n=99) and healthy volunteers at low cardiovascular disease risk (n=40). Under basal conditions, the digital pulse volume amplitude demonstrated a significant positive correlation with the brachial artery velocity-time integral, that was independent of arterial diameter, in both the healthy volunteer (rs=0.64, P<0.001) and coronary artery disease (rs=0.63, P<0.001) cohorts. Similar positive relationships were observed with baseline brachial artery blood flow velocity and blood flow. In contrast, no relationship between the reactive hyperemia-evoked digital PAT ratio and either brachial artery flow-mediated dilation or shear stress was observed in either cohort (P=NS). In conclusion...

‣ Delayed rupture of a pseudoaneurysm in the brachial artery of a burn reconstruction patient

Lee, Jun Yong; Kim, Hyeri; Kwon, Ho; Jung, Sung-No
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 13/06/2013 Português
Relevância na Pesquisa
48.40608%
A brachial artery pseudoaneurysm is a rare but serious condition that can be limb threatening. A number of reports have found that it may be the result of damage to the blood vessels around the brachial artery, either directly or indirectly, due to trauma or systemic diseases. We present our experience of delayed pseudoaneurysm rupture of the brachial artery in a rehabilitation patient with burns of the upper extremity who underwent fasciotomy and musculocutaneous flap coverage. We also provide a review of the brachial artery pseudoaneurysm.

‣ Sex Specific Effects of Habitual Aerobic Exercise on Brachial Artery Flow-Mediated Dilation in Middle-Aged and Older Adults

Pierce, Gary L.; Eskurza, Iratxe; Walker, Ashley E.; Fay, Tara N.; Seals, Douglas R.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /01/2011 Português
Relevância na Pesquisa
48.60546%
Brachial artery flow-mediated dilation (FMD) is impaired with aging and is associated with increased risk for cardiovascular disease (CVD). We determined if regular aerobic exercise improves brachial artery FMD in middle-aged/older (MA/O) men and postmenopausal women. In sedentary MA/O adults (age 55 – 79 years) without CVD, 8 weeks of brisk walking (6 days/week for ~50 min/day; randomized, controlled design) increased treadmill time ~20% in both MA/O men (n=11) and postmenopausal women (n=15) (P<0.01), without altering body composition or circulating CVD risk factors. Brachial artery FMD increased > 50% in the MA/O men (4.6 ± 0.6 to 7.1 ± 0.6%, P < 0.01), but did not change in the postmenopausal women (5.1 ± 0.8 vs. 5.4 ± 0.7%, P = 0.50). No changes occurred in the non-exercising controls. In a separate cross-sectional study (n =167), brachial artery FMD was ~50% greater in endurance exercise-trained (6.4 ± 0.4%, n = 45) vs. sedentary (4.3 ± 0.3%, n = 60) MA/O men (P < 0.001), whereas there were no differences between endurance-trained (5.3 ± 0.7%, n = 20) and sedentary (5.6 ± 0.5%, n = 42) postmenopausal women (P = 0.70). Brachial artery lumen diameter, peak hyperemic shear rate and endothelium independent dilation did not differ with exercise intervention or in the endurance-exercise vs. sedentary groups. Regular aerobic exercise is consistently associated with enhanced brachial artery FMD in MA/O men...

‣ Vascular patterns of upper limb: an anatomical study with accent on superficial brachial artery

Kachlik, David; Konarik, Marek; Baca, Vaclav
Fonte: Association of Basic Medical Sciences of Federation of Bosnia and Herzegovina Publicador: Association of Basic Medical Sciences of Federation of Bosnia and Herzegovina
Tipo: Artigo de Revista Científica
Publicado em /02/2011 Português
Relevância na Pesquisa
48.719434%
The aim of the study was to evaluate the terminal segmentation of the axillary artery and to present four cases of anomalous branching of the axillary artery, the superficial brachial artery (arteria brachialis superficialis), which is defined as the brachial artery that runs superficially to the median nerve. Totally, 130 cadaveric upper arms embalmed by classical formaldehyde technique from collections of the Department of Anatomy, Third Faculty of Medicine, Charles University in Prague, were macroscopically dissected with special focus on the branching arrangement of the axillary artery. The most distal part of the axillary artery (infrapectoral part) terminated in four cases as a bifurcation into two terminal branches: the superficial brachial artery and profunda brachii artery, denominated according to their relation to the median nerve. The profunda brachii artery primarily gave rise to the main branches of the infrapectoral part of the axillary artery. The superficial brachial artery descended to the cubital fossa where it assumed the usual course of the brachial artery in two cases and in the other two cases its branches (the radial and ulnar arteries) passed superficially to the flexors. The incidence of the superficial brachial artery in our study was 5% of cases. The reported incidence is a bit contradictory...

‣ Brachial Artery Responses to Ambient Pollution, Temperature, and Humidity in People with Type 2 Diabetes: A Repeated-Measures Study

Zanobetti, Antonella; Luttmann-Gibson, Heike; Horton, Edward S.; Cohen, Allison; Coull, Brent A.; Hoffmann, Barbara; Schwartz, Joel D.; Mittleman, Murray A.; Li, Yongsheng; Stone, Peter H.; de Souza, Celine; Lamparello, Brooke; Koutrakis, Petros; Gold, Di
Fonte: National Institute of Environmental Health Sciences Publicador: National Institute of Environmental Health Sciences
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
48.519614%
Background: Extreme weather and air pollution are associated with increased cardiovascular risk in people with diabetes. Objectives: In a population with diabetes, we conducted a novel assessment of vascular brachial artery responses both to ambient pollution and to weather (temperature and water vapor pressure, a measure of humidity). Methods: Sixty-four 49- to 85-year-old Boston residents with type 2 diabetes completed up to five study visits (279 repeated measures). Brachial artery diameter (BAD) was measured by ultrasound before and after brachial artery occlusion [i.e., flow-mediated dilation (FMD)] and before and after nitroglycerin-mediated dilation (NMD). Ambient concentrations of fine particulate mass (PM2.5), black carbon (BC), organic carbon (OC), elemental carbon, particle number, and sulfate were measured at our monitoring site; ambient concentrations of carbon monoxide, nitrogen dioxide, and ozone were obtained from state monitors. Particle exposure in the home and during each trip to the clinic (home/trip exposure) was measured continuously and as a 5-day integrated sample. We used linear models with fixed effects for participants, adjusting for date, season, temperature, and water vapor pressure on the day of each visit...

‣ Does altering brachial artery tone with lower-body negative pressure and flow-mediated dilation affect arterial stiffness?

Goswami, Ruma.
Fonte: Brock University Publicador: Brock University
Tipo: Electronic Thesis or Dissertation
Português
Relevância na Pesquisa
48.474155%
Although medium sized, muscular vessels normally respond to sympathetic stimulation by reducing compliance, it is unclear whether the large brachial artery is similarly affected by sympathetic stimulation induced via lower-body negative pressure (LBNP). Similarly, the impact of flow-mediated dilation (FMD) on brachial artery compliance and distensibility remains unresolved, hi addition, before such measures can be used as prognostic tools, it is important to investigate the reliability and repeatability of both techniques. Using a randomized order design, the effects of LBNP and FMD on the mechanical properties of the brachial artery were examined in nine healthy male subjects (mean age 24y). Non-invasive Doppler ultrasound and a Finometer were used to measure simultaneously the variation in systolic and diastolic diameter, and brachial blood pressure, respectively. These values were used to calculate compliance and distensibility values at baseline, and during both LBNP and FMD. The within-day and between-day repeatability of arterial diameter, compliance, distensibility, and FMD measures were assessed using the error coefficient and intra-class correlation coefficient (ICC). While heart rate (P<0.01) and peripheral resistance increased during LBNP (P<0.05)...

‣ Non-iatrogenic trauma of the brachial artery.; Traumatismos não iatrogénicos da artéria braquial.

Wolosker, N; Departamento de Cirurgia Vascular, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo, Brasil.; Gaudêncio, A; Guimarães, P C; Kuzniec, S; Cunha e Sá, D; Aun, R; Langer, B
Fonte: Ordem dos Médicos Publicador: Ordem dos Médicos
Tipo: info:eu-repo/semantics/article; article; article; info:eu-repo/semantics/publishedVersion Formato: application/pdf
Publicado em 31/01/1994 Português
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Brachial artery trauma are treated quite frequently in the emergency units. Between January 1987 and December 1990 we studied prospectively 50 patients with brachial artery trauma at the Hospital das Clinicas, of University of Sao Paulo. The patients mean age ranged from 2 to 64 years. Males were predominant with 46 patients. Most of them were white (66%). Penetrating injuries were the most frequent. Most of these injuries were caused by gunshot wounds or stabing. Absence of distal palpable pulses was the predominant finding among the clinical features (94%). 74% of the patients do not present important ischemia. The right side was more affected (34 patients). 14 patients had concomitant nerve injury. 35 patients (70%) were submitted to arterial reconstruction with saphenous vein. 12 patients (24%) had end-to-end vascular anastomoses. 3 patients (6%) were submitted to brachial artery ligation. 2 patients underwent simultaneous median nerve repair. In 3 patients we used fasciotomy. 6 patients developed arterial occlusion following vascular reconstruction and in one of them it was necessary to perform amputation. 2 patients had wound infection with saphenous vein repair disruption. Both were treated with brachial artery ligation and one underwent amputation. One patient died on the post operative period owing to associated lesions. Limb preservation was achieved in 47 patients (94%). 33 (70.2%) had no neurological deficit and 14 (29.7%) had some degree of neurological deficit. None of the patients had venous hypertension at the time of discharge.; Brachial artery trauma are treated quite frequently in the emergency units. Between January 1987 and December 1990 we studied prospectively 50 patients with brachial artery trauma at the Hospital das Clinicas...