Fig. 1From: Intravascular ultrasound findings and stent implantation for a patient with coronary spastic angina at site of progressive atherosclerotic plaque and responded poorly to medical treatment: a case reportHolter records during the chest pain attack. a and b: sequential change of lead II during an entire episode of chest pain; c: 12-leads ECG recorded during chest pain showed ST-segment elevation in leads II, III and avFBack to article page