or below the aortic valve as in hypertrophic obstructive cardiomyopathy (HOCM) or subvalvular aortic stenosis (SAS; often caused by a thin, crescent-shaped subvalvular membrane). (Devabhaktuni SR ...

Aortic stenosis (AS) occurs when the orifice of the aortic valve is significantly reduced due to the failure of the aortic valve leaflets to open fully during systole. This causes an effective ...