Diagnostic Implications of an Elevated Troponin in the Emergency Department
Table 1
Types of myocardial infarction (MI).
Type
Definition
I
Infarction due to ischemia from a primary coronary event such as atherosclerotic plaque rupture and thrombus formation, arterial wall erosion, fissuring, or dissection
II
Infarction secondary to ischemia from either increased oxygen demand or decreased supply (coronary artery spasm, hypotension, hypertension, anemia, and dysrhythmia)
III
Sudden cardiac death/arrest with symptoms suggestive of STEMI or thrombus in a coronary artery found on angiography or autopsy
IVa
Infarction resulting from percutaneous coronary intervention (PCI)
IVb
Infarction from stent thrombosis
V
Infarction due to ischemia related to coronary artery bypass grafting