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Figure 4 Patient with high-grade stenosis of the proximal left anterior descending coronary artery (LAD). Coronary angiograms in typical (a) right anterior oblique (RAO) and (b) left anterior oblique (LAO) projections. The T2* maps (short-axis view of left ventricle) before (c) and after (d) administration of dipyridamole. In the latter case, the magnetic resonance examination had to be interrupted during dipyridamole infusion owing to severe angina of the patient. Note the reduced T2* in the anteroseptal area (the region which is associated with the diseased vessel). The dark region at the inferolateral zone (d) is due to susceptibility artifacts arising from phrenicomediastinal recess. Ten weeks after dilation of the LAD (e), the measurement (also with dipyridamole) was finished without complications. When observing the obtained T2* maps, differences between regions with reduced T2* values and regions of normal myocardium were less pronounced than they were before percutaneous transluminal coronary angioplasty. Colors from black to white reflect T2* values from 15 to 50 ms. LCx = circumflex branch of left coronary artery.
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