Evolução natural das estenoses nas artérias ilíacas em pacientes com claudicação intermitente submetidos a tratamento clínico

PURPOSE: Inspite of the long experience with the treatment of intermittent claudication, little is known about the natural history of stenotic lesions in the iliac segment. With the advent of endovascular treatment, this knowledge has become important. METHODS: Fifty-two stenosis, diagnosed using arteriography, in 38 claudicant patients were analyzed. After a minimum time interval of 6 months, a magnetic resonance angiography was performed to determine whether there was arterial occlusion. The primary factors that could influence the progression of a stenosis were analyzed, such as risk factors (smoking, hypertension, diabetes, sex, and age), compliance with clinical treatment, initial degree of stenosis, site of the stenosis, and length of follow-up. RESULTS: The average length of follow-up was 39 months. From the 52 lesions analyzed, 13 (25%) evolved to occlusion. When occlusion occurred, there was clinical deterioration in 63.2% of cases. This association was statistically significant (P = .002). There was no statistically significant association of the progression of the lesion with the degree or site of stenosis, compliance with treatment, or length of follow-up. Patients who evolved to occlusion were younger (P = .02). The logistic regression model showed that the determinant factors for clinical deterioration were arterial occlusion and noncompliance with clinical treatment. CONCLUSIONS: The progression of a stenosis to occlusion, which occurred in 25% of the cases, caused clinical deterioration. Clinical treatment was important, but it did not forestall the arterial occlusion. Prevention of occlusion could be achieved by early endovascular intervention or with the development of drugs that might stabilize the atherosclerotic plaque.OBJETIVO: Apesar da longa experiência com o tratamento da Claudicação Intermitente, pouco se sabe sobre a evolução natural das estenoses nas artérias ilíacas. Com o advento do tratamento endovascular, esse conhecimento tornou-se importante. MÉTODOS: Foram avaliadas cinqüenta e duas estenoses, diagnosticadas por arteriografia, em 38 pacientes com claudicação intermitente acompanhados clinicamente. Após um intervalo de tempo mínimo de 6 meses, os pacientes foram submetidos a uma angioressonância para determinar se houve oclusão arterial. Principais medidas de avaliação: Foram avaliados os principais fatores que poderiam influenciar a progressão da estenose, como os fatores de risco (tabagismo, hipertensão, diabete, sexo, idade), a aderência ao tratamento clínico,o grau de estenose inicial, sua localização e o tempo de observação. RESULTADOS: O período médio de observação foi de 39 meses. Das 52 lesões analisadas, 13 (25%) evoluíram para oclusão. Quando houve oclusão, ocorreu piora clínica na maioria dos casos (63,2%), sendo esta associação estatisticamente significante (p=0,002). O grau de estenose inicial, sua localização, a aderência ao tratamento e o tempo de observação não apresentaram relação com a progressão da lesão. Os pacientes que evoluíram para oclusão eram mais jovens (p=0,02). Pelo teste de regressão logística, os fatores determinantes da piora clínica foram a oclusão do vaso e a não aderência ao tratamento clínico. CONCLUSÕES: A progressão da estenose para oclusão, que ocorre em 25% dos casos, gera piora clínica. O tratamento clínico, apesar de importante, não preveniu a oclusão arterial, que poderá ser alcançada com o desenvolvimento de drogas que possam estabilizar a placa aterosclerótica ou com intervenções endovasculares precoces

Predictors of walking capacity in peripheral arterial disease patients

OBJECTIVE: To estimate walking capacity in intermittent claudication patients through a prediction model based on clinical characteristics and the walking impairment questionnaire. METHODS: The sample included 133 intermittent claudication patients of both genders aged between 30 and 80 years. Data regarding clinical characteristics, the walking impairment questionnaire and treadmill walking test performance were obtained. Multiple regression modeling was conducted to predict claudication onset distance and total walking distance using clinical characteristics (age, height, mass, body mass index, ankle brachial index lower, gender, history of smoking and co-morbid conditions) and walking impairment questionnaire responses. Comparisons of claudication onset distance and total walking distance measured during treadmill tests and estimated by a regression equation were performed using paired t-tests. RESULTS: Co-morbid conditions (diabetes and coronary artery disease) and questions related to difficulty in walking short distances (walking indoors - such as around your house and walking 5 blocks) and at low speed (walking 1 block at average speed - usual pace) resulted in the development of new prediction models high significant for claudication onset distance and total walking distance (p0.05) were observed. CONCLUSION: The current study demonstrated that walking capacity can be adequately estimated based on co-morbid conditions and responses to the walking impairment questionnaire

Remote ischemic preconditioning in patients with intermittent claudication

OBJECTIVE: Remote ischemic preconditioning (RIPC) is a phenomenon in which a short period of sub-lethal ischemia in one organ protects against subsequent bouts of ischemia in another organ. We hypothesized that RIPC in patients with intermittent claudication would increase muscle tissue resistance to ischemia, thereby resulting in an increased ability to walk. METHODS: In a claudication clinic, 52 ambulatory patients who presented with complaints of intermittent claudication in the lower limbs associated with an absent or reduced arterial pulse in the symptomatic limb and/or an ankle-brachial index <0.90 were recruited for this study. The patients were randomly divided into three groups (A, B and C). All of the patients underwent two tests on a treadmill according to the Gardener protocol. Group A was tested first without RIPC. Group A was subjected to RIPC prior to the second treadmill test. Group B was subjected to RIPC prior to the first treadmill test and then was subjected to a treadmill test without RIPC. In Group C (control group), both treadmill tests were performed without RIPC. The first and second tests were conducted seven days apart. Brazilian Clinical Trials: RBR-7TF6TM. RESULTS: Group A showed a significant increase in the initial claudication distance in the second test compared to the first test. CONCLUSION: RIPC increased the initial claudication distance in patients with intermittent claudication; however, RIPC did not affect the total walking distance of the patients

Desempenho de pacientes com claudicação intermitente submetidos ao treinamento físico em resposta ao agravamento da doença arterial: estudo retrospectivo de coorte

OBJETIVO: Estudo retrospectivo de coorte para investigar o desfecho clínico de pacientes com claudicação intermitente submetidos a treinamento físico nos quais houve um agravamento da arteriopatia. MÉTODO: Trezentos e sessenta e quatro pacientes com claudicação que apresentavam obstruções fêmoro-poplíteas ou tíbio-peroneiras em ao menos um dos membros inferiores e que não tinham obstrução de aorta ou de ambas artérias ilíacas foram incluídos. Quarenta pacientes desenvolveram novas estenoses em segmentos arteriais previamente poupados (confirmadas por duplex scan), que eram proximais às lesões pré-existentes, e constituiram o grupo progressivo, em contraste com o grupo estável, de pacientes que não apresentou essa piora da doença. O tempo de seguimento foi de 276 e 277 dias para os grupos estável e progressivo, respectivamente. Todos os pacientes passaram por um programa não supervisionado de caminhadas submáximas 4 vezes por semana. Alterações na distância máxima de claudicação num teste de esteira com carga progressiva foram avaliadas durante o seguimento, com interesse especial nos períodos entre a admissão e o diagnóstico da progressão da arteriopatia e o final do acompanhamento. RESULTADOS: A performance não foi significantemente diferente entre ambos grupos, considerando todo o período de seguimento. Ademais, os claudicantes que evoluíram com progressão da arteriopatia não apresentaram, em nenhum momento de seu seguimento, qualquer redução da distância máxima de caminhada em resposta ao desenvolvimento de novas lesões arteriais. CONCLUSÃO: A piora da doença arterial periférica em claudicantes submetidos ao treinamento físico, manifestada por novas oclusões em segmentos arteriais proximais previamente poupados, não implica necessariamente numa piora da distância de claudicação.PURPOSE: This was a retrospective cohort study aiming to investigate the clinical outcome of patients with intermittent claudication undergoing physical training in whom there was an aggravation of the arterial disease. METHOD: Three hundred and sixty-four patients with claudication who presented with femoropopliteal or tibioperoneal obstructions in at least 1 of the lower limbs and who did not have aortic or bilateral iliac obstructions were included. Forty patients developed new stenoses in previously spared arterial segments (confirmed by duplex scanning), which were proximal to preexisting lesions, and formed the progression group, in contrast to the stable group of patients (n = 324) who did not exhibit this worsening of the disease. Follow-up was 276 and 277 days for stable and progression groups, respectively. All patients underwent an unsupervised program of submaximal walking 4 days a week. Changes in maximal walking distance at a progressive treadmill test were appraised during follow-up, with special interest directed to the periods between admission, diagnosis of arterial worsening, and the end of follow-up. RESULTS: Performance was not significantly different between groups during the entire follow-up period. Furthermore, patients with claudication who evolved with progression of their arteriopathy did not present a reduction of their maximal walking distance in response to the development of new arterial lesions at any time during their follow-up. CONCLUSION: Worsening of the peripheral arterial disease in patients with claudication undergoing physical training, manifested as de novo arterial occlusion in proximal and previously spared segments, does not imply in an impairment of their claudication distance

Translation and validation of Hyperhidrosis Disease Severity Scale

Introduction: The evaluation of patients with hyperhidrosis (HH) can be accomplished, among other ways, through questionnaires and scales. The Hyperhidrosis Disease Severity Scale (HDSS) has been used as a simple and quick tool to perform this evaluation. Although HDSS has been well established in several languages, it has not been translated into Portuguese, restricting its specific use for Brazilian patients. The aim of this study was to translate HDSS into Portuguese and validate it in a sample of Brazilian subjects. Method: 290 Brazilian patients (69% women, with a mean age of 28.7±9.6 years and BMI 22.4±3.9 kg/m2) diagnosed with HH were evaluated using HDSS, Quality of Life Questionnaire (QLQ) and Sweating Evolution Questionnaire (SEQ) before and after a five-week oxybutynin treatment. Regarding validation, an association between HDSS results and two other questionnaires was performed. To analyze HDSS sensitivity, evaluation of effects pre- and post-treatment with oxybutynin was conducted. Furthermore, HDSS reproducibility was analyzed in a subsample in which the scale was applied again after 7 days of the first follow-up appointment. Results: There was statistical correlation between HDSS and QLQ and between HDSS and SEQ before treatment and after 5 weeks. Additionally, HDSS was reproducible and sensitive to clinical changes after the treatment period. Conclusion: The Portuguese version of HDSS has been validated and shown to be reproducible in a Brazilian sample. Therefore it can be used as a tool to improve medical assistance in patients with HH