Fig. 2

Serial CAG and ECG during ergonovine provocation test. A, A’ ECG and CAG 2 min after intracoronary administration of intracoronary administration of ergonovine. Middle and distal segments of RCA showed diffuse coronary spasm, ≥ 90% diffuse stenosis in middle and distal RCA. ECG showed dynamic changes in lead II, III and aVF (ST elevation) and precordial leads (T wave inversion). B, B’ ECG and CAG 5 min after intracoronary administration of ergonovine. Middle and distal segments of RCA showed diffuse coronary spasm, nearly subtotal occlusion in middle and distal RCA. ECG showed dynamic changes in lead II, III and aVF (ST elevation) and precordial leads (T wave inversion). C, C’ ECG and CAG after intracoronary administration of nitroglycerin. Middle and distal segments of RCA quickly returned to normal. ECG also returned to baseline. ECG: electrocardiography, CAG: coronary angiography, RCA: right coronary artery