What is bicuspid aortic valve?

Aortic valve is the valve between the left ventricle and aorta. Left ventricle is the lower left chamber of the heart. Aorta is the largest blood vessel carrying oxygenated blood to the whole body from the left ventricle. Normally, the aortic valve has three semilunar leaflets. Bicuspid aortic valve is a birth defect in which aortic valve has two leaflets instead of three. It is the commonest birth defect of the heart and can occur in about one in hundred individuals.