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Bicuspid Aortic Valve
Open BAV
The opening of a BAV
resembles the open mouth
of a fish, leading to the
term “fish mouth” valve.
BAV and Families - Look for the Bulge!
Bicuspid Aortic Valve is A Red Flag
for All Family Members
Including Those With Normal Aortic Valves
Blood relatives of someone with a bicuspid aortic valve may
have other aspects of this condition, even though their aortic
valve has three normal-appearing leaflets. The followings
study of the risk of thoracic aortic disease in BAV family
members with normal-appearing aortic valves was published
in 2007 by several geneticists:
Familial thoracic aortic dilation and bicommissural aortic
valve: a prospective analysis of natural history and
inheritance, Loscalzo ML, Goh DL, Loeys B, Kent KC,
Spevak PJ, Dietz HC, Am J Med Genet A. 2007 Sep
1;143A(17):1960-7
It is important to note in this paper that in all 13 families, at
least one person had an ascending aortic aneurysm with a
three-leaflet aortic valve (considered normal). Dissection or
rupture occurred in some of those tri-leaflet valve individuals.
The authors wrote that a single defective gene may cause
these abnormalities of the valve and aorta independently of
each other.
The Bicuspid Aortic Foundation has heard from families with
a variety of manifestations of bicuspid aortic disease. For
example, in one family, two daughters had clearly identifiable
bicuspid aortic valves and ascending aortic aneurysms (one
of the daughters had a brain aneurysm also). The mother
was told she had a normal, tri-leaflet aortic valve. However,
the mother has an ascending aortic aneurysm.
Much more study and research is needed to understand the
complexity of families where bicuspid aortic valves are
found. Learning must come from these families themselves,
under the careful observation and guidance of physicians.
What these BAV families are teaching us now, is that having
a normal-appearing aortic valve is not enough to insure
safety. It is still possible to be at risk for aneurysm and
dissection.
Bicuspid Aortic Valve
Closed BAV
When closed, it may be
difficult to distinguish a
BAV from an aortic valve
with all three leaflets.
Tricuspid Aortic Valve
Closed TAV
A normal aortic valve has
three leaflets or cusps.
Pictured here is a TAV with
the leaflets closed. The
opening of a TAV is shaped
like a triangle.