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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: J Electrocardiol. 2010 Sep 15;43(6):542–547. doi: 10.1016/j.jelectrocard.2010.07.018

Table 4.

Indications for ST-segment ischemia monitoring

Top Priority for Ischemia Monitoring Timeframe of Monitoring
1. Patients in early phase of acute coronary syndromes (ST-elevation/non–ST-elevation MI, unstable angina) or “rule-out” MI 1. Minimum 24 hours and no ST events for 12–24 hours
2. Patients who present to emergency department with chest pain/anginal equivalent 2. 8–12 hours until negative biomarkers exclude acute MI
3. Patients after nonurgent percutaneous coronary intervention (angioplasty, stenting) with complications in catheterization laboratory (e.g., vessel dissection, no reflow, or suboptimal angiographic result) 3. 24 hours; longer if ST events occur
4. Patients who have possible variant angina due to coronary vasospasm 4. If diagnosis confirmed: until definitive therapy (e.g., calcium- channel blocker) and no ST events for 12–24 hours

MI, myocardial infarction

Adapted from Drew & Funk, 20067