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Figure 2 QTc values (according to the longest QT of all 12 leads) in patients with torsade de pointes following myocardial infarction (black bars) and controls with uncomplicated myocardial infarction (white bars). Day 1: QTc during the hyperacute phase of the infarction. Day 2: QTc following resolution of ST changes. Days 3 to 10: QTc recorded during the day of torsade de pointes (patient group) or in the trace showing the longest QT during days 3 to 10 (controls). Discharge: The QTc at the time of hospital discharge (days 8 to 19). The QTc significantly increased in the controls by day 2 but notably more so in patients who eventually developed torsade de pointes: *p < 0.05; **p < 0.01. The QTc values derived from the mean QT of all the 12 leads gave similar differences among the groups (not shown).