Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12872-021-02090-7/MediaObjects/12872_2021_2090_Fig1_HTML.jpg)
A, B Right coronary angiography (CAG). C, D Left CAG. E, F Optical coherence tomography (OCT) coronary artery images. (A, B) In group R, we evaluated a 10-mm coronary arterial segment that developed CAA in the acute phase (A) and regressed in the convalescent phase (B). (C, D) In group N, we evaluated a 10-mm segment of the origin of each branch, where there were no abnormal changes in the acute (C) or convalescent (D) phases. E OCT image showing disruption of the media and abnormal intimal thickening. F We calculated the intimal cross-sectional area by subtracting the medial area (i.e., vascular lumen cross-sectional area) from the circumferential medial cross-sectional area; the mean area of the target cross sections was determined