De Winter syndrome and ST-segment elevation myocardial infarction can evolve into one another: Report of two cases

Figure 3 Electrocardiography examinations (Case 2). A: Electrocardiogram at the 116^th min after onset of chest pain; B: Electrocardiogram at the 155^th min when symptoms alleviated; C: Electrocardiogram at the 236^th min when chest pain recurred; D: Electrocardiogram recorded prior to emergency coronary angiography (at the 255^th min after onset of pain).