When is eccentric valve considered?

When is eccentric valve considered?

• A. When there is bicuspid valve
• B. When closure is greater than 1/3 from the midline of a normal aortic root
• C. When cusp calcification is >50%
• D. When there is regurgitation only

Answer: (B)

An eccentric valve is defined by the position of the valve’s closure line being off-center within the aortic root. Specifically, if the closure point lies more than one-third of the distance from the midline of a normal aortic root, the valve is described as eccentric. This reflects asymmetric leaflet motion or geometry, which can arise with conditions like bicuspid morphology or uneven leaflet/calcific distribution, and it matters because it signals abnormal coaptation of the leaflets. The other options don’t establish eccentricity on their own. A bicuspid valve describes valve morphology, which can accompany eccentric closure but isn’t the criterion for eccentricity itself. Cusp calcification being greater than 50% relates to calcific burden and potential stenosis, not the off-center closure. Regurgitation present without information about where closure occurs doesn’t define eccentricity.

An eccentric valve is defined by the position of the valve’s closure line being off-center within the aortic root. Specifically, if the closure point lies more than one-third of the distance from the midline of a normal aortic root, the valve is described as eccentric. This reflects asymmetric leaflet motion or geometry, which can arise with conditions like bicuspid morphology or uneven leaflet/calcific distribution, and it matters because it signals abnormal coaptation of the leaflets.

The other options don’t establish eccentricity on their own. A bicuspid valve describes valve morphology, which can accompany eccentric closure but isn’t the criterion for eccentricity itself. Cusp calcification being greater than 50% relates to calcific burden and potential stenosis, not the off-center closure. Regurgitation present without information about where closure occurs doesn’t define eccentricity.