[An unusual finding of annular sclerosis of the mitral valve during heart surgery]

The authors present an uncommon finding of annular sclerosis of the mitral valve in four patients. On operation in three instances severe and in one instance a mild degree of annular sclerosis of the mitral valve was revealed. Two men were 55 and 67 years old and two women were 40 and 67 years old. In two instances the operation was indicated by a myxoma in the left atrium and in two instances by advanced insufficiency of the mitral valve.