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The proband, a 61-year-old man with a history of heavy smoking (30 cigarettes per day for 40 years) presented with significant chest discomfort and loss of consciousness, which was returned after 5 minutes.His initial electrocardiogram (ECG) showed an acute anterior ST-segment-elevation myocardial infarction (STEMI;Figure 1A).In the emergency department,the symptoms were released and partial resolution of ST-segment was noted on the ECG 1 hour post-thrombolysis with reteplase.Coronary angiogram demonstrated a subtotal occlusion in the mid-left anterior descending (LAD) coronary artery (Figure 1B and Video 1) with moderate diseasein the right coronary artery (Figure 1C and Video 2).