Novo episódio de fibrilação atrial

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.

Evidence last reviewed: 12 Feb 2026
Topic last updated: 22 Apr 2024

Summary

Definition

Anamnesis y examen

Principales factores de diagnóstico

  • palpitações
  • frequência de pulso irregular
  • fatores de risco
Todos los datos

Otros factores de diagnóstico

  • dispneia
  • hipotensão sintomática
  • dor/aperto/desconforto torácico
  • fadiga
  • ansiedade
  • comprometimento cognitivo
  • tontura
  • poliúria
  • ruídos adventícios
  • sons cardíacos adicionais
  • pressão venosa jugular elevada
  • evidência de acidente vascular cerebral (AVC)
  • pré-síncope e síncope
Todos los datos

Factores de riesgo

  • idade mais avançada
  • hipertensão
  • insuficiência cardíaca
  • diabetes mellitus
  • apneia obstrutiva do sono
  • obesidade
  • doença arterial coronariana
  • doença valvar
  • outras doenças cardíacas
  • consumo regular e intenso de bebidas alcoólicas
  • cirurgia cardíaca ou torácica
  • outras arritmias atriais
  • AVC/ataque isquêmico transitório prévio
  • hipertireoidismo
  • níveis atléticos de atividade física
  • Doença pulmonar obstrutiva crônica (DPOC)
  • tabagismo
Todos los datos

Pruebas diagnósticas

Primeras pruebas diagnósticas para solicitar

  • eletrocardiograma (ECG)
  • Hemograma completo
  • coagulograma
  • eletrólitos, ureia e creatinina
  • função tireoidiana
  • radiografia torácica
  • ecocardiografia transtorácica (ETT)
Todos los datos

Pruebas diagnósticas que deben considerarse

  • troponina cardíaca
  • gasometria arterial
  • proteína C-reativa
  • peptídeo natriurético do tipo B (PNB)/fragmento N-terminal do peptídeo natriurético do tipo B (NT-proPNB)
  • TFHs
  • velocidade de hemossedimentação
  • ecocardiografia transesofágica (ETE)
  • telemetria para pacientes hospitalizados ou monitoramento por Holter de 24 horas
  • angiografia coronariana (TC ou convencional) ou teste ergométrico
  • ressonância nuclear magnética cardíaca (RNMC) tardia com contraste de gadolínio
  • tomografia computadorizada (TC) cerebral
  • ressonância nuclear magnética (RNM) cranioencefálica
  • Angiografia pulmonar por tomografia computadorizada (APTC)
Todos los datos

Algoritmo de tratamiento

Agudo

hemodinamicamente instável

hemodinamicamente estável: início <48 horas

hemodinamicamente estável: início ≥48 horas ou incerto

En curso

após a estabilização

Colaboradores

Consejeros especializados

Shrilla Banerjee, MD, FRCP

Consultant Interventional Cardiologist

East Surrey Hospital

Surrey and Sussex Healthcare NHS Trust

UK

Divulgaciones

SB has received speaker fees for educational lectures (presentation content was her own) and meeting participation from Menarini, Edwards Lifesciences, Abbott Vascular, and Shockwave IVL. She has also participated in an Advisory Board for Sahajanand Medical Technologies Limited. SB has received travel sponsorship from Biosensors International to attend the PCR meeting in Paris in 2022. She has prepared a manuscript on coronary microvascular dysfunction for Abbott for Cardiovascular News (no royalties).

Agradecimientos

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

Arti N. Shah, MS, MD

Director

Cardiac Electrophysiology

Elmhurst Hospital Center

Elmhurst

Assistant Professor of Medicine

Mount Sinai School of Medicine

New York

NY

ANS is an author of a number of references cited in this topic.

Bharat K. Kantharia MD, FRCP, FAHA, FACC, FESC, FHRS

Cardiovascular and Heart Rhythm Consultant

Attending and Consultant Cardiac Electrophysiologist

Mount Sinai Hospitals

New York Methodist Hospital

New York

NY

West Houston Medical Center

Memorial Hermann Hospital

Houston

TX

BKK is an author of a number of references cited in this topic.

Resham Baruah MBBS, BSc, MRCP, PhD

Consultant Cardiologist

Chelsea and Westminster Hospital and the Royal Brompton and Harefield NHS Trust

London

UK

RB has received honorarium/speaker fees from Novartis and Boehringer Ingleheim.

Adam D. Hartley MBBS, BSc, MRCP

Wellcome Trust Clinical Research Fellow

Imperial College London

Specialist Registrar in Cardiology

Imperial College Healthcare NHS Trust

London

UK

ADH declares that he has no competing interests.

Revisores por pares

Gregory Lip, MD, FRCP, DFM, FACC, FESC, FEHRA

Price-Evans Professor of Cardiovascular Medicine

University of Liverpool

Senior Investigator

National Institute for Health Research

UK

Distinguished Professor

Faculty of Medicine

Aalborg University

Denmark

Adjunct Professor

Yonsei University

Seoul

South Korea

Disclosures

GL is a consultant for Bayer/Janssen, BMS/Pfizer, Medtronic, Boehringer Ingelheim, Novartis, Verseon, and Daiichi-Sankyo. He is a speaker for Bayer, BMS/Pfizer, Medtronic, Boehringer Ingelheim, and Daiichi-Sankyo. No fees are directly received personally. GL is an author of a number of references cited in this topic.

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

Hindricks G, Potpara T, Dagres N, et al. 2020 ESC guidelines for the diagnosis and management of atrial fibrillation developed in collaboration with the European Association of Cardio-Thoracic Surgery (EACTS). Eur Heart J. 2021 Feb 1;42(5):373-498.Full text  Abstract

National Institute for Health and Care Excellence. Atrial fibrillation: diagnosis and management. June 2021 [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.
  • Novo episódio de fibrilação atrial images
  • Differentials

    • Flutter atrial
    • Síndrome de Wolff-Parkinson-White
    • Taquicardia atrial
    More Differentials
  • Guidelines

    • Atrial fibrillation: diagnosis and management
    • 2020 ESC guidelines for the management of atrial fibrillation
    More Guidelines
  • Calculators

    Escore de fibrilação atrial CHA(2)DS(2)-VASc para o risco de AVC

    Escore de Risco de Sangramento ORBIT

    More Calculators
  • Videos

    Como realizar uma demonstração animada do ECG

    More videos
  • Patient information

    Fibrilação atrial: o que é?

    More Patient information
  • padlock-lockedLog in or subscribe to access all of BMJ Best Practice

Use of this content is subject to our disclaimer