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An ECG pattern that signifies occlusion of the proximal left anterior descending coronary artery (LAD) without ST-segment elevation
ST segments show a 1-3mm upsloping depression at the J point in leads V1 to V6 that continue into tall positive symmetrical T waves
QRS complexes are typically not widened or only slightly widened
Some patients also display loss of precordial R-wave progression
Most patients display 1-2mm ST-elevation in lead aVR
References
de Winter R, et al. A New ECG Sign of Proximal LAD Occlusion. NEJM Nov, 2008:359;19