<unk>  is characterized by at least one of the following: # Occurs at rest or minimal exertion and usually lasts more than 20 minutes (if nitroglycerin is not administered) # Being severe (at least Canadian Cardiovascular Society Classification 3) and of new onset (i.e. within 1 month) # Occurs with a crescendo pattern (brought on by less activity, more severe, more prolonged or increased frequency than previously). Fifty percent of people with<unk>  will have evidence of necrosis of the heart's muscular cells based on elevated cardiac serum markers such as creatine kinase isoenzyme (CK)-MB and troponin T or I, and thus have a diagnosis of non-ST elevation myocardial infarction.
Unstable angina
Variant angina
Microvascular angina
Torsades de pointes
Acute coronary syndrome
Palisade 
Angina
Angina 