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Figure 2 Twelve-lead electrocardiogram in the baseline condition (A) and after injection of 40 µg ergonovine maleate (EM) into the right coronary artery (B) in a control subject. Injection of EM produced right coronary spasm (segment no. 2, 75%; segment no. 4, 100%), associated with ST-segment elevation in leads II, III, and aVF (B, arrows). However, no ST-segment elevation was observed in leads V1 to V3, like that in patients with Brugada syndrome (B, arrows).
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