Aortic atresia: Congenital absence of the normal valvular opening from the left ventricle of the heart into the aorta.
Atresia here refers to the absence of a normal opening.
- Aortic dissection
A progressive tear in the aorta. The inner lining (intima) of the aorta tears and blood surges through the tear, creating a new false channel and separating (dissecting) the middle layer (media) from the outer layer of the aorta. Aortic dissection usually occurs in the thoracic aorta, less often the abdominal aorta. About three-fourths of […]
- Aortic insufficiency
Aortic insufficiency: Backflow of blood from the aorta into the left ventricle across a weakened aortic valve. Also known as aortic regurgitation.
- Aortic regurgitation
Aortic regurgitation: The return of blood from the aorta into the left ventricle of the heart due to aortic valve insufficiency, incomplete closure of the aortic valve.
- Aortic stenosis
Narrowing (stenosis) of the aortic valve, the valve between the left ventricle of the heart and the aorta. This narrowing impedes the delivery of blood to the body through the aorta and makes the heart work harder. The need for surgery depends on the degree of stenosis. A procedure called balloon valvuloplasty has been used […]
- Aortic valve
Aortic valve: One of the four valves in the heart, this valve is situated at exit of the left ventricle of the heart where the aorta (the largest of all arteries) begins. The aortic valve lets blood from the left ventricle be pumped up (ejected) into the aorta but prevents blood once it is in […]