Disease or Syndrome
unstable angina
[ uhn-stey-buhl an-jahy-nuh, an-juh-nuh ]
Subclass of:
Angina Pectoris
Also called:
Acute Coronary Insufficiency; Intermediate Syndrome; Preinfarction Angina
Definitions related to angina, unstable:
  • (unstable angina) A condition in which there is angina pectoris that occurs without stress or activity, or with decreasing stress or activity compared with stable angina, and has been present for less than 2 wks.
    ACC/AHA Clinical Data Terminology
    American College of Cardiology and American Heart Association , 2020
  • (unstable angina) Angina pectoris (or equivalent type of ischemic discomfort) which has recently changed in frequency, duration, intensity, or occurs at rest.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • (unstable angina) Chest pain that occurs or worsens in frequency, severity, or duration when a person is at rest or engaging in mild activity.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • Precordial pain at rest, which may precede a MYOCARDIAL INFARCTION.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Unstable angina results from acute obstruction of a coronary artery without myocardial infarction. Symptoms include chest discomfort with or without dyspnea, nausea, and diaphoresis. Diagnosis is by ECG and the presence or absence of serologic markers. Treatment is with antiplatelet drugs, anticoagulants, nitrates, statins, and...
    Merck Manuals
    Merck & Co., Inc., 2020
  • Chest pain is a nonspecific symptom that can have cardiac or noncardiac causes (see DDx). Unstable angina belongs to the spectrum of clinical presentations referred to collectively as acute coronary syndromes (ACSs), which range from ST-segment elevation myocardial infarction (STEMI) to non-STEMI (NSTEMI).
    Medscape
    WebMD, 2019
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.