Fig. 1From: Diagnosis and prognosis of myocardial infarction in a patient without obstructive coronary artery disease during bronchoscopy: a case study and literature reviewDynamic changes in electrocardiography during the acute myocardial infarction. a, Sinus rhythm, normal ECG. b, ST-segments elevation in leads V2–6 during the sudden onset of cardiac attack. c, Pathological Q waves in leads V2–3, ST-segments elevation in leads V1–4, T-waves inverted in lead V1–3 and aVLBack to article page