High Lateral STEMI - D1 of LAD There is transmural injury isolated to I & aVL. These leads represent the ‘High Lateral’ wall—which is supplied by D1 of LAD & OM1 of Circumflex. These can look similar but this ST Depression pattern suggests D1! Cath showed 100% proximal occlusion. - Sam Ghali, M.D. @EM_RESUS #STEMI #High Lateral #D1 #LAD #Diagonal1 #ECG #EKG #Electrocardiogram #Cardiology #Clinical