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Risco de Acidente Vascular Encefálico: Avaliação pela Termografia Cutânea por Radiação Infravermelha

DOI: http://dx.doi.org/10.18073/2358-4696/pajmt.v1n1p23-30

http://www.abraterm.com.br/revista/index.php/PAJTM/index 

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Edmar B. Santos1, Carlo Bonasso1, Luciane F. Balbinot2 , Marcos L. Brioschi2, Henrique T. Bianco3, José J. F. Raposo Filho1

   

Resumo: O acidente vascular encefálico (AVE) assim como outras doenças cardiovasculares mantem relação com disfunção endotelial e o risco futuro é normalmente avaliado pelo escore de Framingham para AVE (EF-AVE). O objetivo deste estudo é avaliar se a termografia cutânea por radiação infravermelha é capaz de avaliar o risco de AVE utilizando o fenômeno de isquemia-reperfusão como modelo de avaliação da função endotelial. Materiais e métodos: Avaliamos 55 pacientes ambulatoriais através de delineamento transversal analítico. Foram submetidos ao EF-AVE e a termografia cutânea das falanges distais das palmas das mãos direita e esquerda antes, durante e após manobra de compressão supra-sistólica do braço por 5 minutos. Resultados: Houve significância estatística de todas as variáveis térmicas. O EFAVE aumentou 1,14% a cada ponto na taxa de isquemia máxima e 1,18% a cada ponto na Tar. A reatividade neurovascular alterada foi capaz de distinguir aqueles com maior risco de AVE (4,9 contra 8,8 com p = 0,02). Conclusão: A termografia cutânea com radiação infravermelha mostrou boa correlação com o EF-AVE em 10 anos. Este resultado sugere que o método poderá ser utilizado no futuro para estratificação do risco de AVE.

Palavras-chave: termografia, acidente vascular cerebral, reatividade vascular, disfunção endotelial.

 

Abstract: Stroke as well as other cardiovascular diseases maintains relationship with endothelial dysfunction and future risk is usually assessed by the Framingham score for stroke (FRSS).The aim of this study is to assess whether infrared thermography is capable of evaluating the risk of stroke using the phenomenon of ischemia-reperfusion as endothelial function assessment model. Materials and methods: We evaluated 55 outpatients through analytical cross-sectional design. They were subjected to the Framingham score for stroke and infrared thermography of the distal phalanges of the palms of right and left hands before, during and after supra-systolic compression of the arm maneuver for 5 minutes. Results: There were statistically significant for all thermal variables. The FRSS increased 1.14% for each point on the maximum rate of ischemia and 1.18% for each point on the Tar. The altered neurovascular reactivity was able to distinguish those at higher risk of stroke (4.9 versus 8.8, p = 0.02). Conclusion: Infrared thermography showed good correlation with the FRSS in 10 years. This result suggests that the method may be used in the future to stratify stroke risk.

Key words: thermography, stroke, vascular reactivity, endothelial dysfunction

 

1 Hospital Israelita Albert Einstein (HIAE) - e-mail: dr.edmar@gmail.com
2 Pós Graduação em Termologia Clínica e Termografia- HC-FMUSP
3 Setor de Lípides, Aterosclerose e Biologia Vascular.Disciplina de Cardiologia - UNIFESP/EPM

 

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