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Table I Primary end point definitions

From: Early and long-term outcome of elective stenting of the infarct-related artery in patients with viability in the infarct-area: Rationale and design of the Viability-guided Angioplasty after acute Myocardial Infarction-trial (The VIAMI-trial)

Definition of reinfarction
1. Reinfarction during hospitalization for index infarct and not related to revascularization procedures
- Either ischemic type of chest discomfort or new electrocardiographic changes indicative for transmural ischemia or necrosis with an increase in the total creatine kinase and MB isoenzyme activity. The activity of CK-MB has to be at least 2 times the upper limit of normal and more than 50% above the previous baseline value.
2. Reinfarction discharge for index infarct and not related to revascularization procedures
- Either a history of ischemic chest discomfort, usually lasting > 20 minutes, or classic electrocardiographic changes indicative for transmural ischemia with an increase in the total creatine kinase and MB isoenzyme activity of at least 2 times the upper limit of normal.
- New abnormal Q-waves (amplitude ≥ 1/3 of total QRS amplitude and ≥ 0.04 seconds) in ≥ 2 contiguous leads.
3. Periprocedural reinfarction during revascularization after index infarct
PCI
- Classic electrocardiographic changes indicative for transmural ischemia with an increase in the total creatine kinase and MB isoenzyme activity of at least 2 times the upper limit of normal.
- New abnormal Q-waves (amplitude ≥ 1/3 of total QRS amplitude and ≥ 0.04 seconds) in ≥ 2 contiguous leads.
CABG
- Classic electrocardiographic changes indicative for transmural ischemia with an increase in the total creatine kinase and MB isoenzyme activity of at least 5 times the upper limit of normal.
- New abnormal Q-waves (amplitude ≥ 1/3 of total QRS amplitude and ≥ 0.04 seconds) in ≥ 2 contiguous leads.
Definition of unstable angina
- Ischemic type of chest discomfort at rest or with minimal exertion, with a duration of at least 15 minutes. The presenting symptoms must represent a change from the patients' usual anginal pattern.
- Either a need for intravenous medical intervention and/or objective evidence of myocardial ischemia (dynamic ST changes in ≥ 2 contiguous electrocardiographic leads, or an abnormal elevation of Troponin-T or Troponin-I without a significant rise of CK MB isoenzyme activity)
  1. PCI, percutaneous coronary intervention; CABG, coronary artery bypass grafting; CK-MB, creatine kinase myocardial enzyme