Ataque isquêmico transitório

Ver PDF
  • Visão geral
  • Teoria
  • Diagnóstico
  • Tratamento
  • ACOMPANHAMENTO
  • Recursos

When viewing this topic in a different language, you may notice some differences in the way the content is structured, but it still reflects the latest evidence-based guidance.

Evidencia revisada por última vez: 13 Feb 2026
Tema actualizado por última vez: 04 Mar 2026

Resumen

Definición

Anamnesis y examen

Principales factores de diagnóstico

  • início súbito e breve duração dos sintomas (minutos)
  • relato de paciente/testemunha de deficit neurológico focal
Todos los datos

Otros factores de diagnóstico

  • fraqueza unilateral ou paralisia
  • disfasia
  • ataxia, vertigem ou perda do equilíbrio
  • perda súbita e transitória da visão em um olho (amaurose fugaz)
  • hemianopsia homônima
  • diplopia
  • fatores de risco
Todos los datos

Factores de riesgo

  • fibrilação atrial
  • valvopatia
  • estenose da carótida
  • estenose intracraniana
  • insuficiência cardíaca congestiva
  • hipertensão
  • hiperlipidemia
  • diabetes mellitus
  • tabagismo
  • transtornos decorrentes do uso de bebidas alcoólicas
  • idade avançada
  • forame oval patente (FOP)
  • sedentarismo
  • obesidade
  • hipercoagulabilidade
Todos los datos

Pruebas diagnósticas

Primeras pruebas diagnósticas para solicitar

  • glicose sanguínea
  • hemograma completo e contagem de plaquetas
  • tempo de protrombina, INR, tempo de tromboplastina parcial
  • perfil lipídico em jejum
  • eletrólitos séricos
  • eletrocardiograma (ECG)
Todos los datos

Pruebas diagnósticas que deben considerarse

  • Tomografia computadorizada (TC)
Todos los datos

Algoritmo de tratamiento

Inicial

suspeita de ataque isquêmico transitório

Agudo

ataque isquêmico transitório confirmado

Colaboradores

Consejeros especializados

Matthew Jones, MD, FRCP

Consultant Neurologist

Manchester Centre for Clinical Neurosciences

Northern Care Alliance

Honorary Senior Lecturer

University of Manchester

Manchester

UK

Disclosures

MJ is the chair of the Association of British Neurologists Education Committee (unpaid position). MJ is a faculty member of a MRCP revision course and has received honoraria from Eisai for educational talks.

Rachael Power, MBChB, MRCP

Neurology Registrar

Manchester Centre for Clinical Neurosciences

Manchester

UK

Disclosures

RP declares that she has no competing interests.

Acknowledgements

BMJ Best Practice would like to gratefully acknowledge the previous team of expert contributors, whose work is retained in parts of the content:

Jennifer Simpson, MD

Associate Assistant Professor

Department of Neurology

University of Colorado School of Medicine

Denver

CO

Disclosures: JS is a site investigator for the POINT trial.

Ethan Cumbler, MD

Associate Professor

Section of Hospital Medicine

Department of Internal Medicine

Division of Medicine

University of Colorado School of Medicine

Denver

CO

Disclosures: EC declares that he has no competing interests.

Peer reviewers

Kayvan Khadjooi, MD, FRCP, PGCertMedEd

Consultant in Stroke Medicine

Addenbrooke’s Hospital

Associate Lecturer

School of Clinical Medicine

University of Cambridge

Cambridge

UK

Disclosures

KK has received travel grants for conferences/speaker honoraria from Bayer, Boehringer, Daiichi-Sankyo, Pfizer, and Shire.

Peer reviewer acknowledgements

BMJ Best Practice topics are updated on a rolling basis in line with developments in evidence and guidance. The peer reviewers listed here have reviewed the content at least once during the history of the topic.

Disclosures

Peer reviewer affiliations and disclosures pertain to the time of the review.

References

Our in-house evidence and editorial teams collaborate with international expert contributors and peer reviewers to ensure that we provide access to the most clinically relevant information possible.

Key articles

National Institute for Health and Care Excellence. Stroke and transient ischaemic attack in over 16s: diagnosis and initial management. Apr 2022 [internet publication].Full text

Royal College of Physicians; Scottish Intercollegiate Guidelines Network; Royal College of Physicians of Ireland. National clinical guidelines for stroke for the United Kingdom and Ireland. April 2023 [internet publication].Full text

Reference articles

A full list of sources referenced in this topic is available to users with access to all of BMJ Best Practice.

  • Differentials

    • Acidente vascular cerebral (AVC)
    • Hipoglicemia
    • Convulsão com paralisia pós-convulsão (paralisia de Todd)
    More Differentials

  • Guidelines

    • Hypertension in adults: diagnosis and management
    • Stroke and transient ischaemic attack in over 16s: diagnosis and initial management
    More Guidelines

  • Calculadoras

    Escore de AVC do NIH

    Mais Calculadoras

  • Videos

    Como realizar uma demonstração animada do ECG

    Venopunção e flebotomia – Vídeo de demonstração

    Mais vídeos

  • Folhetos informativos para os pacientes

    AVC causado por um coágulo sanguíneo: prevenção de um novo AVC

    Ataque isquêmico transitório (mini AVC)

    Mais Folhetos informativos para os pacientes
  • padlock-lockedConectar-se ou assinar para acessar todo o BMJ Best Practice

O uso deste conteúdo está sujeito ao nosso aviso legal