PMC6078573_01
A) Left coronary angiography; B) Visualization of expanded conus branch for overfilled with contrast medium; C) The stain disappeared 40 seconds later; D) Right coronary angiography revealed a nearly normal right coronary artery and conus branch.
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Transradial coronary angiography of a 74-year-old man who was admitted with atypical chest pain revealed no obstructive disease in the left anterior descending (LAD) or left circumflex arteries (LCX; Figure 1A). During right coronary angiography with a 5-French tiger-shaped universal catheter (Terumo Corporation, Japan), the conus branch was superselected, and beading expansion of this branch was observed after overfilling with contrast medium (white arrow in Figure 1B). The the stain completely disappeared thereafter (Figure 1C). Angiography was then continued, and it revealed a nearly normal right coronary artery and conus branch (Figure 1D).