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(A) The coronary flow reserve (CFR) and index of microcirculatory resistance (IMR) values measured in the left anterior descending coronary artery were 1.6 and 23, respectively. (B) An electrocardiogram performed at the time of the second admission showed T wave inversions with prolonged QT intervals in leads II, III, aVF, and V3 to V6. (C and D) An echocardiography revealed apical ballooning (C, end-diastole; D, end-systole).
