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Vieussens’ ring is an embryologic remnant that requires clinical significance as an intercoronary collateral vessel in ultra-modern coronary artery disease. Its origin as a peritruncal structure recently in embryologic spread, and its syndicate with congenital pulmonary artery fistula, produce a crucial insight into the recent stages of the coronary circulation. This review explains the embryologic basis of Vieussens’ ring in link to the development of the coronary arteries, which describes its location, appearance, and clinical importance.
