(Case 1) ST segment depression attributable to myocardial ischaemia (non-infarction)—ECG demonstrated NSR with ST segment depression in the anterolateral leads (V2 to V6) consistent with a non-infarction acute coronary ischaemic syndrome. (Case 1) ST segment depression attributable to myocardial ischaemia (non-infarction)—ECG demonstrated NSR with ST segment depression in the anterolateral leads (V2 to V6) consistent with a non-infarction acute coronary ischaemic syndrome. The STD is downsloping in morphology, suggestive of ischaemia. T Pollehn et al. Emerg Med J 2002;19:129-135 Copyright © BMJ Publishing Group Ltd and the College of Emergency Medicine. All rights reserved.