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Unstable angina

Última revisão: 24 Sep 2025
Última atualização: 03 Sep 2025

Resumo

Definição

History and exam

Key diagnostic factors

  • Chest pain
Full details

Other diagnostic factors

  • diaphoresis
  • epigastric pain
  • dyspnea
  • nausea and vomiting
  • carotid bruit
  • diminished or absent peripheral pulses
  • syncope
  • back pain
  • arrhythmias
  • abnormal heart sounds
  • rales
Full details

Risk factors

  • smoking
  • hypertension
  • diabetes mellitus
  • obesity and metabolic syndrome
  • sedentary behavior and physical inactivity
  • dyslipidemia
  • chronic kidney disease (CKD)
  • atherosclerosis (history of angina, MI, stroke, transient ischemic attack, peripheral vascular disease)
  • family history of premature CAD
  • age >60 years
  • cocaine use
  • depression
  • sleep apnea
  • elevated C-reactive protein levels
  • mediastinal radiation
  • migraine
  • adverse pregnancy outcomes
Full details

Diagnostic investigations

1st investigations to order

  • ECG
  • cardiac biomarkers
  • CXR
  • CBC
  • electrolytes and renal function
  • LFTs
  • blood sugar
  • CRP
  • lipid profile
  • coagulation profile
Full details

Tests to avoid

  • coronary artery calcium (CAC)
Full details

Investigations to consider

  • echocardiogram
  • coronary angiography
  • functional (stress) testing
  • coronary CT angiography
  • CT chest or MRI
Full details

Treatment algorithm

INITIAL

presumed cardiac chest pain

ACUTE

non-ST-elevation acute coronary syndrome

ONGOING

poststabilization: confirmed UA (nonelevated cardiac biomarkers)

Contributors

Authors

Syed Wamique Yusuf, MBBS, FRCPI
Syed Wamique Yusuf

Professor of Medicine

Department of Cardiology

University of Texas

MD Anderson Cancer Center

Houston

TX

Divulgaciones

SWY declares that he has no competing interests.

Agradecimientos

Dr Syed Wamique Yusuf would like to gratefully acknowledge Dr Iyad N. Daher, the previous contributor to this topic.

Divulgaciones

IND declares that he has no competing interests.

Revisores por pares

John Charpie, MD, PhD

Associate Professor of Pediatrics

Medical Director

Pediatric Cardiothoracic Intensive Care Unit

University of Michigan Congenital Heart Center

Ann Arbor

MI

Divulgaciones

JC declares that he has no competing interests.

Zaza Iakobishvili, MD, PhD

Director

Emergency Cardiac Service ICCU

Department of Cardiology

Rabin Medical Center

Petah Tikva

Israel

Divulgaciones

ZI declares that he has no competing interests.

Helge Mollmann, MD

Kerckhoff Heart and Thorax Center

Bad Nauheim

Germany

Divulgaciones

HM declares that he has no competing interests.

Agradecimiento de los revisores por pares

Los temas de BMJ Best Practice se actualizan de forma continua de acuerdo con los desarrollos en la evidencia y en las guías. Los revisores por pares listados aquí han revisado el contenido al menos una vez durante la historia del tema.

Divulgaciones

Las afiliaciones y divulgaciones de los revisores por pares se refieren al momento de la revisión.

Referencias

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Artículos principales

Byrne RA, Rossello X, Coughlan JJ, et al. 2023 ESC guidelines for the management of acute coronary syndromes. Eur Heart J. 2023 Oct 12;44(38):3720-826.Texto completo  Resumen

Rao SV, O'Donoghue ML, Ruel M, et al. 2025 ACC/AHA/ACEP/NAEMSP/SCAI guideline for the management of patients with acute coronary syndromes: a report of the American College of Cardiology/American Heart Association Joint Committee on clinical practice guidelines. Circulation. 2025 Apr;151(13):e771-862.Texto completo  Resumen

Gulati M, Levy PD, Mukherjee D, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR guideline for the evaluation and diagnosis of chest pain: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol. 2021 Nov 30;78(22):e187-285.Texto completo  Resumen

Lawton JS, Tamis-Holland JE, Bangalore S, et al. 2021 ACC/AHA/SCAI guideline for coronary artery revascularization: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2022 Jan 18;145(3):e18-114.Texto completo  Resumen

Artículos de referencia

Una lista completa de las fuentes a las que se hace referencia en este tema está disponible para los usuarios con acceso a todo BMJ Best Practice.
  • Unstable angina images
  • Diferenciales

    • Stable angina
    • Prinzmetal (variant or vasospastic) angina
    • Non-ST-elevation myocardial infarction
    Más Diferenciales
  • Guías de práctica clínica

    • 2025 ACC/AHA/ACEP/NAEMSP/SCAI guideline for the management of patients with acute coronary syndromes: a report of the American College of Cardiology/American Heart Association Joint Committee on clinical practice guidelines
    • 2023 ESC guidelines for the management of acute coronary syndromes
    Más Guías de práctica clínica
  • Folletos para el paciente

    Unstable angina: what is it?

    Heart attack

    Más Folletos para el paciente
  • Calculadoras

    ASCVD Risk Estimator Plus

    Thrombolysis in Myocardial Infarction (TIMI) Score for Unstable Angina Non ST Elevation Myocardial Infarction

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  • Videos

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    How to perform an ECG: animated demonstration

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