unstable angina

unstable angina
unstable angina n angina pectoris characterized by sudden changes (as an increase in the severity or length of anginal attacks or a decrease in the exertion required to precipitate an attack) esp. when symptoms were previously stable

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unstable angina pectoris angina pectoris that occurs unpredictably or suddenly increases in severity or frequency; attacks may occur without provocation, such as during sleep or rest, may not respond to nitroglycerin, and may be of unusually long duration. Prinzmetal angina is often included in this category. Cf. stable a. pectoris.

Medical dictionary. 2011.

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Look at other dictionaries:

  • unstable angina — noun Date: 1972 angina pectoris characterized by sudden changes (as an increase in the severity or length of anginal attacks or a decrease in the exertion required to precipitate an attack) especially when symptoms were previously stable …   New Collegiate Dictionary

  • Angina pectoris — Angina redirects here. For other uses, see Angina (disambiguation). Angina pectoris Classification and external resources ICD 10 I20 ICD 9 …   Wikipedia

  • Angina pectoris — Chest pain that is typically severe and crushing with a feeling just behind the breastbone (the sternum) of pressure and suffocation, due to an inadequate supply of oxygen to the heart muscle. The term “angina pectoris” comes from the Latin… …   Medical dictionary

  • Angina — is chest pain that is due to an inadequate supply of oxygen to the heart muscle. The chest pain of angina is typically severe and crushing. There is a feeling just behind the breastbone (the sternum) of pressure and suffocation. The word “angina” …   Medical dictionary

  • Prinzmetal angina — Chest pain due to coronary artery spasm, a sudden constriction of a coronary artery (one of the vessels that supply the heart muscle with blood rich in oxygen) depriving the heart muscle (myocardium) of blood and oxygen. This is also called… …   Medical dictionary

  • stable angina — pectoris, typical angina angina pectoris occurring in attacks of predictable frequency and duration after provocation by circumstances that increase myocardial oxygen demands, such as exercise, emotional stress, or excitement, the precipitating… …   Medical dictionary

  • preinfarction angina — 1. angina pectoris preceding a myocardial infarction. 2. unstable a. pectoris …   Medical dictionary

  • UNASEM — Unstable Angina Study Using Eminase …   Medical dictionary

  • UNSA — Unstable Angina Study …   Medical dictionary

  • UNASEM — • Unstable Angina Study Using Eminase …   Dictionary of medical acronyms & abbreviations

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