🫀 Bicuspid Aortic Valve (BAV) Explained | Congenital Heart Disease Made Easy Bicuspid Aortic Valve (BAV) is the most common congenital heart defect in adults, affecting approximately 1–2% of the population. Although many patients are asymptomatic early in life, BAV can lead to premature aortic stenosis, aortic regurgitation, ascending aortic aneurysm, aortic dissection, and infective endocarditis. In this high-yield lesson, you'll learn the embryology, pathophysiology, clinical presentation, di