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Eventos neurológicos em jovens: quais as suas principais causas? 69a3g

Artigo escrito pelo Prof. Dr. Sthefano Atique Gabriel

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Assim como observado nas doenças cardiovasculares, a aterosclerose constitui a principal causa da isquemia cerebral, que pode se manifestar de maneira transitória ou definitiva, com sequelas irreversíveis. Portanto, os fatores de riscos que causam o infarto do miocárdio também podem aumentar o risco de derrame cerebral, incluindo níveis pressóricos elevados, sobrepeso, obesidade, colesterol elevado, hábito de fumar e estresse emocional.

Na maior parte dos casos, todavia, o derrame cerebral é de origem isquêmica por oclusão de artérias intracranianas. Entretanto, em aproximadamente 15% a 20% dos pacientes, o acometimento neurológico pode ocorrer devido a placas de colesterol observadas nas artérias carótidas, localizadas na região cervical.

Nestes casos, micro fragmentos de placas, presentes no bulbo carotídeo, embolizam para o cérebro, causando micro eventos neurológicos, que podem se manifestar clinicamente como ataques isquêmicos transitórios, acidentes vasculares cerebrais, perdas visuais transitórias e, cronicamente, atrofia cerebral com evolução para quadros demenciais.

Pelo tempo necessário para que a aterosclerose se desenvolva no corpo humano, espera-se identificar alterações ateroscleróticas nas artérias carótidas em indivíduos a partir dos 50 anos de idade. Portanto, quando se trata de eventos neurológicos em pessoas mais jovens, devemos pesquisar outras etiologias, tais como, acidentes, traumas esportivos ou predisposições a quadros trombóticos.

As recentes divulgações das mídias sociais comprovam a maior incidência de isquemia cerebral em jovens, na maior parte dos casos associado a traumas esportivos decorrentes de quedas com lesões cervicais, impactos cranianos frontais ou posteriores e   movimentos complexos executados incorretamente, como por exemplo nos exercícios com barras, que exigem esforço torácico, cervical e cranial.

Quando o exercício físico supera o limite corporal, pode ocorrer a dissecção da artéria carótida, caracterizada pela fratura da parede arterial, com formação de um septo intraluminal que delimita duas luzes dentro da artéria. A luz falsa tende a trombosar e comprimir a luz verdadeira residual, com oclusão da artéria carótida e evolução para quadros de perda da força motora, alterações de equilíbrio e dor de cabeça de forte intensidade.

Sintomas neurológicos após impactos e quedas decorrentes de atividades físicas complexas e intensas exigem avaliação médica em caráter de urgência. O check-up vascular constitui sempre a melhor maneira de prevenir alterações neurológicas decorrentes da aterosclerose. Além disso, o doppler vascular fornece informações valiosas para o diagnóstico da alteração cerebral isquêmica pós trauma em indivíduos jovens. Para mais informações, e o site www.drsthefanovascular.com.br

Prof. Dr. Sthefano Atique Gabriel. Doutor em Pesquisa em Cirurgia pela Faculdade de Ciências Médicas da Santa Casa de São Paulo, especialista nas áreas de Cirurgia Vascular, Angiorradiologia e Cirurgia Endovascular e coordenador do curso de Medicina da União das Faculdades dos Grandes Lagos (Unilago).

 

 

 

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