"type a: four equal-sized cusps"
"type b: three equal-sized cusps and one smaller cusp; considered the most common variation 1"
"type c: two equal-sized large and two equal-sized smaller cusps"
"type d: one large, two indeterminate and one smaller cusp"
"type e: three equal-sized cusps and one larger cusp"
"type f: two equal-sized large cusps and two smaller cusps not equal in size"
"type g: four cusps unequal in size"
Expected headings
"Associations"
"Echocardiography"
"Complications"
"The estimated incidence of necropsy is ~1 in 8,000. The incidence of QAV on 2D echocardiography has been reported to range from 0.01% to 0.04%. There is no recognised gender predilection. Some reports suggest that this anomaly may be in up to 1% of individuals who present for aortic valve surgery 6."
"type b: three equal-sized cusps and one smaller cusp; considered the most common variation 1"
"History and etymology"