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Figure 3 A 47-year-old man with infarct-related long QT syndrome. Day 1: Acute anterior infarction treated with streptokinase. Peak creatine kinase = 600 U/l (QTc = 450 ms). Day 2: Partial resolution of ST-elevation (QTc = 450 ms). Day 7: Inverted T-waves have developed (QTc = 469 ms). Catheterization showed subtotal occlusion of a small diagonal branch (treated conservatively). Day 9: Cardiac arrest with ventricular fibrillation (VF). Giant inverted T-waves are evident (QTc = 540 ms). Repeated cardiac catheterization showed no changes. Day 11: Recurrent pause-dependent torsade de pointes despite beta-blockers and magnesium. Note the "short-long-short" initiating sequence (S = short cycle; L = long cycle). Day 60: The QT interval two months after the infarct is normal (QTc = 400 ms).
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