TY - JOUR T1 - True posterior myocardial infarction: the importance of leads V7–V9 JF - Emergency Medicine Journal JO - Emerg Med J SP - 456 LP - 457 DO - 10.1136/emj.2008.069195 VL - 26 IS - 6 AU - J Lindridge Y1 - 2009/06/01 UR - http://emj.bmj.com/content/26/6/456.abstract N2 - An ambulance crew attended a patient complaining of chest pain with a clinical picture strongly suggestive of acute myocardial infarction (AMI).A 12-lead electrocardiogram (ECG) was obtained, which demonstrated ST segment depression of 1 mm in V2–V4 with upright T waves and hyperacute R waves in V1 and V2 (fig 1). A posterior myocardial infarction (MI) was considered and a series of posterior views was obtained to confirm the diagnosis. Leads V7 and V8 revealed ST segment elevation of 1 mm prompting removal to the cardiac catheter laboratory for expert assessment.Figure 1 Standard ECG showing anterior ST segment depression followed by posterior views revealing ST segment elevation in v7 and v8. … ER -