CHORUS

Collaborative Hypertext of Radiology

Cardiovascular system

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subvalvular aortic stenosis

• anatomic/fixed subaortic stenosis:
  • associated with cardiac defects in 50% (usually VSD)
• functional/dynamic subartic stenosis:
  • asymetrical septal hypertrophy (ASH)
  • idiopathic hypertrophic subaortic stenosis (IHSS)
  • hypertrophic obstructive cardiomyopathy (HOCM)

• asymmetrically thicker ventricular septum than free wall of the left ventricle (95%)
• normal/small left + right ventricular cavities (95%)
• systolic anterior motion of the mitral valve
• lucent subaortic filling defect in systole
• coarse systolic flutter of valve cusps
• may see mitral regurgitation (secondary to abnormal position of anterolateral pappilary muscle)

see: aortic stenosis

Related CHORUS documents: aortic stenosis abnormal heart chamber dimensions IHSS valvular aortic stenosis left ventricular volume overload aortic coarctation

Copyright © 2013, Charles E. Kahn, Jr.