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Ischemic time according to the presence or absence or pre-infarction angina: Ischemic time was plotted according to the presence of absence of pre-infarction angina. Mean ischemic time, indicated by horizontal line, is not significantly different between patients with and without pre-infarction angina (185 ± 8min vs. 181 ± 5, p=0.67, Student’s t-test).
