The aortic valve ( aortic valve ) is one of the four heart valves. It is located in the aorta directly to the origin of the left ventricle and prevents backflow of blood at the beginning of the relaxation phase (diastole ) of the heart.
The aortic valve is a flap pocket often consist of three crescent- shaped pockets ( valvulae ), which are developments of the intima, the innermost layer of blood vessels:
- Valvula semilunaris artery (right half-moon shaped pocket )
- Valvula semilunaris sinistra (left crescent- shaped pocket )
- Valvula semilunaris septal ( located on the ventricular septum crescent- shaped pocket )
The aortic valve is formed in humans, together with the pulmonary valve in the 5th to 7th week of embryonic development. Sometimes the aortic valve consists of only two pocket flaps.
Close the flap no longer sealed, one speaks of a aortic regurgitation. An insufficient opening is called aortic stenosis. Both disorders require increased pumping work of the heart and lead to an overload of the heart muscle.