Sub-valvular Aoic Stenosis is known to be associated with all of the following, except:

Answer is C (Tricuspid valve atresia) Tricuspid Valve Atresia is not associated with Subvalvular Aoic Stenosis. Subvalvular Aoic Stenosis (Subaoic Stenosis) Subaoic stenosis is defined as obstruction to left ventricular outflow below the aoic valve. It is the second most common form of fixed aoic stenosis. The most common form of subaoic stenosis is 'Discrete' Subaoic Stenosis is fuher classified into 'Discrete' type and 'Diffuse Tunnel-Type' narrowing Types of Subaoic Stenosis `Discrete' (85 to 90 percent) : Most common form of subaoic stenosis `Diffuse' or 'Long Segment Tunnel-Type'(10%to 15% ) Some have attempted to subdivide the discrete form into membranous and fibromuscular but such distinction is difficult Boys are more frequently affected than girls at a ratio of approximately 2:1. Subaoic stenosis is associated with other cardiac abnormalities in 50% to 70% of patients The two most_ frequently associated defects with subaoic stenosis are Ventricular Septal Defect and Coarctation of Aoa. Aoic regurgitation is the most common complication of subaoic stenosis occurring in as many as 50 percent of patients Cardiac Anomalies Associated with subaoic stenosis Aoic regurgitation Aoic valve stenosis Patent ductus aeriosus Coarctation of the aoa Interrupted aoic arch Mitral valve abnormalities Ventricular septal defect Repaired a trioventricular septal defects Double-chambered right ventricle