Aortic dissection limited to one sinus of Valsalva has been observed as an iatrogenic complication during coronary intervention. We report on a 65-year-old female patient who had a diagnosis of acute inferior myocardial infarction and experienced type A aortic dissection during stenting of the right coronary artery (RCA). Dissection was seen during aortic injection. There were no associated diseases in the sinuses of Valsalva or the aortic valve. An opening was seen intraoperatively in the right sinus of Valsalva. The opening was immediately and successfully sutured. The RCA was bypassed.