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Figure 5 Three anterior MIs with contrast images and electrocardiographic leads V1 to V6 shown: (A) non-transmural Q-wave (QW) myocardial infarction (MI), (B) transmural non–Q-wave (NQW) MI, (C) transmural NQW MI with right bundle-branch block. These cases illustrate the relative importance of the total size of infarction over the transmural extent of infarction. The non-transmural MI shows QWs, with 24% of the left ventricle (LV) infarcted, whereas the transmural MIs do not have QWs, with 9% and 13% of the LV infarcted, respectively. The infarct localized to the septum (C), but still defined as an anterior territory MI has associated right bundle-branch block rather than QWs. RV = right ventricle.
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