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

Figure 1 Electrocardiography examinations (Case 1). A: Electrocardiogram performed 57 min after onset of pain; B: Electrocardiogram at the 100^th min with persistent chest pain; C: Electrocardiogram at the 172^th min with persistent chest pain; D: Electrocardiogram after the percutaneous coronary intervention.

Figure 2 Coronary angiogram showing complete occlusion of the proximal left anterior descending coronary and a 90% stenosis of the middle of the left circumflex arteries (left) and that after drug-eluting stent placement (right).

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).

Figure 4 Coronary angiogram showing a 99% stenosis of the middle left anterior descending artery (left) and that after drug-eluting stent placement (right).