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Definition: a muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart.
Synonym(s): border of oval fossa, anulus ovalis, margin of fossa ovalis, Vieussens anulus, Vieussens isthmus, Vieussens limbus, Vieussens ring
Examples: glitazone, GI cocktail, etc.
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Data sources include Micromedex™ (updated Apr 16th, 2012), Cerner Multum™ (updated May 18th, 2012), Wolters Kluwer™ (updated Apr 29th, 2012) and others.
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