Casas R E, Marriott H J, Glancy D L
St. Francis Hospital, Evanston, and Loyola University, Chicago, Illinois, USA.
Am J Cardiol. 1997 Aug 15;80(4):508-9. doi: 10.1016/s0002-9149(97)00404-9.
Left posterolateral chest leads (V7, V8, V9) helped distinguish the multiple causes of tall R waves in V1 and/or V2, diagnosed true posterior myocardial infarction when standard leads did not, and identified the presence or absence of posterior injury in patients with inferior infarction.