Younger patients: usually from a congenital bicuspid valve
Older patients: usually from calcifications on aortic valve
Rheumatic heart disease is the next most common
Significant obstruction when orifice <1 cm or pressure grad is >50 mmHg
Aortic stenosis
Mitral stenosis
Mitral regurgitation
Aortic regurgitation
Mitral valve prolapse
Left ventricular hypertrophy
Left atrial enlargement
Stone heart