Accessory mitral valve tissue

A congenital non-syndromic heart malformation characratized by an accessory mitral valve leaflet or various accessory mitral valve structures. It may be asymptomatic or present at various ages with symptoms of left ventricular outflow tract obstruction, low cardiac output due to subaortic obstruction or congestive heart failure. In some cases, it may be a source of cardioembolism. The malformation may be isolated or associated with other congenital heart malformations.

Ventricular septal hypertrophy

The dividing wall between left and right sides of the heart, thickens and bulges into the left ventricle.

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PMID (PMCID)
2140849	MALE	Infant
	[A successful surgical case report of subaortic stenosis due to accessory mitral valve tissue associated with partial ventricular septal hypertrophy].
	Anbe J, Mitsuishi T, Nakajima H, Suzuki R, Akasaka T, Yanagawa Y. Nihon Kyobu Geka Gakkai Zasshi. 1990;38(2):330-5.
	[A successful surgical case report of subaortic stenosis due to accessory mitral valve tissue associated with partial ventricular septal hypertrophy].