Efeitos tardios da radioterapia mediastinal sobre as valvas cardíacas:

uma revisão narrativa

Autores

  • Marco Aurélio Santos Cordeiro Universidade Evangélica de Goiás - UniEVANGÉLICA

DOI:

https://doi.org/10.37951/2358-9868.2022v10i2.p95-102

Palavras-chave:

radioterapia mediastinal, irradiação mediastinal, cardiopatia induzida por radiação, doença valvar cardíaca induzida por radiação, radioterapia, doença valvar cardíaca, câncer

Resumo

A utilização da radioterapia (RT) mediastinal para tratar tumores próximos ao coração pode resultar em doença valvar cardíaca induzida pela radiação, dentre outras patologias cardiovasculares. Pode haver um intervalo de latência de anos ou décadas entre a exposição à radiação e o desenvolvimento de doença valvar cardíaca clinicamente significativa, com o dano valvar caracterizado por fibrose e calcificação. O aumento de risco está relacionado à dose de radiação recebida, ao intervalo desde a última exposição e ao uso concomitante de quimioterapia cardiotóxica. Desfechos clínicos relevantes a longo prazo e o risco perioperatório de cirurgia valvar estão relacionados aos efeitos da radiação nas estruturas mediastinais, incluindo fibrose pulmonar, disfunção ventricular e constrição pericárdica. Novas técnicas de RT mediastinal estão sendo desenvolvidas para reduzir a dose de radiação no coração. Estratégias de vigilância e rastreamento são requeridas para este grupo de sobreviventes de câncer sob risco de desenvolver complicações valvares significativas.

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2022-12-20

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