Matsumura K, Otagaki M, Fujii K, et al. - Researchers investigated the value of coronary artery calcification as a clinical marker to identify survivors of out-of-hospital cardiac arrest (OHCA) without ST-segment elevation who could benefit from emergency coronary artery angiography. They enrolled 100 consecutive survivors of OHCA without ST-segment elevation with no obvious extra-cardiac cause who had undergone emergency CT and coronary artery angiography. Among these, 30 survivors were diagnosed to have unstable coronary lesion. In multivariate logistic regression analysis, coronary artery calcification was noted to be an independent predictor of unstable coronary lesion. This suggests the possible utility of evaluation of coronary artery calcification by CT in recognizing patients with unstable coronary lesion who may benefit from emergency coronary artery angiography among survivors of OHCA without ST-segment elevation on post-resuscitation electrocardiography.