主动脉瓣并非是两个瓣叶的才钙化。有时，在老年人中正常的三个瓣叶的主动脉瓣也会发生钙化，被称为“老年性钙化的主动脉瓣狭窄”。可见瓣膜尖端有钙化结节。
An aortic valve need not be bicuspid to calcify. Sometimes in older adults, a normal tricuspid aortic valve will undergo calcification, a so-called "senile calcific aortic stenosis." Nodules of calcification are seen on the cusps here.