English: The aortic valve controls outflow of blood from the left ventricle of the heart through the aorta (valve is indicated within the yellow highlighted box). Normal aortic valve is tricuspid. Five types of bicuspid valve are shown, with Type 1 being most prevalent. Bicuspid valve forms when the tissue surrounding one of the cusps (leaflets) of the valve fuse during fetal development. This developmental anomaly can have either negative or no effect on the individual. Source used: https://www.escardio.org/Journals/E-Journal-of-Cardiology-Practice/Volume-13/Bicuspid-aortic-valve