Valvular Stenosis

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Myxomatous Aortic Valve

un ¡cuspid valve

Figure 14-1. This photograph shows severe valvular stenosis as it occurs in a newborn. There is a unicuspid, horseshoe-shaped leaflet with a single posterior commissure. Leaflet tissue is thick, fibrous, and myxomatous. Successful valvotomy can be performed by creating a second commissure. Significant aortic regurgitation is rare due to the fibrous nature of the valve that prevents redundancy. Although typically there is residual stenosis after surgery, many infants will do surprisingly well for many years, even though the valve appears severely malformed and incompatible with life. This photograph was taken of a postmortem specimen in a child who died of other causes.

un ¡cuspid valve

Figure 14-1. This photograph shows severe valvular stenosis as it occurs in a newborn. There is a unicuspid, horseshoe-shaped leaflet with a single posterior commissure. Leaflet tissue is thick, fibrous, and myxomatous. Successful valvotomy can be performed by creating a second commissure. Significant aortic regurgitation is rare due to the fibrous nature of the valve that prevents redundancy. Although typically there is residual stenosis after surgery, many infants will do surprisingly well for many years, even though the valve appears severely malformed and incompatible with life. This photograph was taken of a postmortem specimen in a child who died of other causes.

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Malformed Aortic Valve

Figure 14-2. For comparison, this postmortem specimen shows a normal aortic valve in another newborn infant. There are three cusps and each is thin and pliable.

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Figure 14-2. For comparison, this postmortem specimen shows a normal aortic valve in another newborn infant. There are three cusps and each is thin and pliable.

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Coronary Cusps

right coronary cusp stenotic commissures non coronary cusp left coronary cusp

Figure 14-3. In this older child with valvular stenosis, the exposure is through a proximal ascending aortotomy, with cardiopulmonary bypass, aortic cross-clamping, and cardioplegia. There are three leaflets that are fibrous and thickened with stenosis primarily of two commissures.

right coronary cusp stenotic commissures non coronary cusp left coronary cusp

Figure 14-3. In this older child with valvular stenosis, the exposure is through a proximal ascending aortotomy, with cardiopulmonary bypass, aortic cross-clamping, and cardioplegia. There are three leaflets that are fibrous and thickened with stenosis primarily of two commissures.

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Pulmonary Stenosis

incised commissures

Figure 14-4. Valvotomy is performed by incising stenotic commissures. In some cases, the leaflets are thinned by resecting fibrous tissue.

incised commissures

Figure 14-4. Valvotomy is performed by incising stenotic commissures. In some cases, the leaflets are thinned by resecting fibrous tissue.

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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